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Finding the Fourth Proportional to 85,691.52, 128,520 and 23,353.92

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Solution

The fourth proportional to 85,691.52, 128,520 and 23,353.92 is: 35,026.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,691.52 : 128,520 = 23,353.92 : x
  2. Step 2: Convert to fraction form
    85,691.52/128,520 = 23,353.92/x
  3. Step 3: Cross multiply
    85,691.52x = 128,520 × 23,353.92
  4. Step 4: Simplify right side
    85,691.52x = 3,001,445,798.40
  5. Step 5: Solve for x
    x = 3,001,445,798.40/85,691.52
  6. Step 6: Final answer
    x = 35,026.17

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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.