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Finding the Fourth Proportional to 124,640,690.80, 186,961,036.20 and 70,892,978.80

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Solution

The fourth proportional to 124,640,690.80, 186,961,036.20 and 70,892,978.80 is: 106,339,468.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,640,690.80 : 186,961,036.20 = 70,892,978.80 : x
  2. Step 2: Convert to fraction form
    124,640,690.80/186,961,036.20 = 70,892,978.80/x
  3. Step 3: Cross multiply
    124,640,690.80x = 186,961,036.20 × 70,892,978.80
  4. Step 4: Simplify right side
    124,640,690.80x = 13,254,224,775,752,632
  5. Step 5: Solve for x
    x = 13,254,224,775,752,632/124,640,690.80
  6. Step 6: Final answer
    x = 106,339,468.20

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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.