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Finding the Fourth Proportional to 85,356.48, 128,035.20 and 32,753.28

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Solution

The fourth proportional to 85,356.48, 128,035.20 and 32,753.28 is: 49,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,356.48 : 128,035.20 = 32,753.28 : x
  2. Step 2: Convert to fraction form
    85,356.48/128,035.20 = 32,753.28/x
  3. Step 3: Cross multiply
    85,356.48x = 128,035.20 × 32,753.28
  4. Step 4: Simplify right side
    85,356.48x = 4,193,572,755.46
  5. Step 5: Solve for x
    x = 4,193,572,755.46/85,356.48
  6. Step 6: Final answer
    x = 49,130.10

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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.