Home / 208,763,981,319.40-313,017,815,977.02-81,129,644,103.16

Finding the Fourth Proportional to 208,763,981,319.40, 313,017,815,977.02 and 81,129,644,103.16

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Solution

The fourth proportional to 208,763,981,319.40, 313,017,815,977.02 and 81,129,644,103.16 is: 121,644,662,300.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,763,981,319.40 : 313,017,815,977.02 = 81,129,644,103.16 : x
  2. Step 2: Convert to fraction form
    208,763,981,319.40/313,017,815,977.02 = 81,129,644,103.16/x
  3. Step 3: Cross multiply
    208,763,981,319.40x = 313,017,815,977.02 × 81,129,644,103.16
  4. Step 4: Simplify right side
    208,763,981,319.40x = 25,395,024,008,165,315,313,664
  5. Step 5: Solve for x
    x = 25,395,024,008,165,315,313,664/208,763,981,319.40
  6. Step 6: Final answer
    x = 121,644,662,300.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.