Home / 129,650,549.04-178,878,915-74,644,991.28

Finding the Fourth Proportional to 129,650,549.04, 178,878,915 and 74,644,991.28

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Solution

The fourth proportional to 129,650,549.04, 178,878,915 and 74,644,991.28 is: 102,987,724.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,650,549.04 : 178,878,915 = 74,644,991.28 : x
  2. Step 2: Convert to fraction form
    129,650,549.04/178,878,915 = 74,644,991.28/x
  3. Step 3: Cross multiply
    129,650,549.04x = 178,878,915 × 74,644,991.28
  4. Step 4: Simplify right side
    129,650,549.04x = 13,352,415,050,350,862
  5. Step 5: Solve for x
    x = 13,352,415,050,350,862/129,650,549.04
  6. Step 6: Final answer
    x = 102,987,724.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.