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Finding the Fourth Proportional to 88,898.40, 133,088.40 and 86,306.40

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Solution

The fourth proportional to 88,898.40, 133,088.40 and 86,306.40 is: 129,207.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,898.40 : 133,088.40 = 86,306.40 : x
  2. Step 2: Convert to fraction form
    88,898.40/133,088.40 = 86,306.40/x
  3. Step 3: Cross multiply
    88,898.40x = 133,088.40 × 86,306.40
  4. Step 4: Simplify right side
    88,898.40x = 11,486,380,685.76
  5. Step 5: Solve for x
    x = 11,486,380,685.76/88,898.40
  6. Step 6: Final answer
    x = 129,207.96

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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.