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Finding the Fourth Proportional to 118,387.20, 177,580.80 and 81,062.40

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Solution

The fourth proportional to 118,387.20, 177,580.80 and 81,062.40 is: 121,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,387.20 : 177,580.80 = 81,062.40 : x
  2. Step 2: Convert to fraction form
    118,387.20/177,580.80 = 81,062.40/x
  3. Step 3: Cross multiply
    118,387.20x = 177,580.80 × 81,062.40
  4. Step 4: Simplify right side
    118,387.20x = 14,395,125,841.92
  5. Step 5: Solve for x
    x = 14,395,125,841.92/118,387.20
  6. Step 6: Final answer
    x = 121,593.60

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1.5x scale

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.