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Finding the Fourth Proportional to 272,810.16, 409,279.44 and 85,821.60

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Solution

The fourth proportional to 272,810.16, 409,279.44 and 85,821.60 is: 128,752.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,810.16 : 409,279.44 = 85,821.60 : x
  2. Step 2: Convert to fraction form
    272,810.16/409,279.44 = 85,821.60/x
  3. Step 3: Cross multiply
    272,810.16x = 409,279.44 × 85,821.60
  4. Step 4: Simplify right side
    272,810.16x = 35,125,016,387.90
  5. Step 5: Solve for x
    x = 35,125,016,387.90/272,810.16
  6. Step 6: Final answer
    x = 128,752.60

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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.