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Finding the Fourth Proportional to 88,918.20, 133,377.30 and 85,807.80

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Solution

The fourth proportional to 88,918.20, 133,377.30 and 85,807.80 is: 128,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,918.20 : 133,377.30 = 85,807.80 : x
  2. Step 2: Convert to fraction form
    88,918.20/133,377.30 = 85,807.80/x
  3. Step 3: Cross multiply
    88,918.20x = 133,377.30 × 85,807.80
  4. Step 4: Simplify right side
    88,918.20x = 11,444,812,682.94
  5. Step 5: Solve for x
    x = 11,444,812,682.94/88,918.20
  6. Step 6: Final answer
    x = 128,711.70

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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.