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Finding the Fourth Proportional to 314,929,144.80, 472,393,717.20 and 84,889,987.20

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Solution

The fourth proportional to 314,929,144.80, 472,393,717.20 and 84,889,987.20 is: 127,334,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,929,144.80 : 472,393,717.20 = 84,889,987.20 : x
  2. Step 2: Convert to fraction form
    314,929,144.80/472,393,717.20 = 84,889,987.20/x
  3. Step 3: Cross multiply
    314,929,144.80x = 472,393,717.20 × 84,889,987.20
  4. Step 4: Simplify right side
    314,929,144.80x = 40,101,496,606,468,424
  5. Step 5: Solve for x
    x = 40,101,496,606,468,424/314,929,144.80
  6. Step 6: Final answer
    x = 127,334,980.80

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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.