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Finding the Fourth Proportional to 85,472.64, 128,001.60 and 59,103.36

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Solution

The fourth proportional to 85,472.64, 128,001.60 and 59,103.36 is: 88,511.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.64 : 128,001.60 = 59,103.36 : x
  2. Step 2: Convert to fraction form
    85,472.64/128,001.60 = 59,103.36/x
  3. Step 3: Cross multiply
    85,472.64x = 128,001.60 × 59,103.36
  4. Step 4: Simplify right side
    85,472.64x = 7,565,324,645.38
  5. Step 5: Solve for x
    x = 7,565,324,645.38/85,472.64
  6. Step 6: Final answer
    x = 88,511.65

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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.