Home / 272,841.20-409,306.60-85,807.60

Finding the Fourth Proportional to 272,841.20, 409,306.60 and 85,807.60

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Solution

The fourth proportional to 272,841.20, 409,306.60 and 85,807.60 is: 128,725.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,841.20 : 409,306.60 = 85,807.60 : x
  2. Step 2: Convert to fraction form
    272,841.20/409,306.60 = 85,807.60/x
  3. Step 3: Cross multiply
    272,841.20x = 409,306.60 × 85,807.60
  4. Step 4: Simplify right side
    272,841.20x = 35,121,617,010.16
  5. Step 5: Solve for x
    x = 35,121,617,010.16/272,841.20
  6. Step 6: Final answer
    x = 128,725.49

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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.