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Finding the Fourth Proportional to 86,672.84, 129,787.32 and 59,981.88

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Solution

The fourth proportional to 86,672.84, 129,787.32 and 59,981.88 is: 89,819.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,672.84 : 129,787.32 = 59,981.88 : x
  2. Step 2: Convert to fraction form
    86,672.84/129,787.32 = 59,981.88/x
  3. Step 3: Cross multiply
    86,672.84x = 129,787.32 × 59,981.88
  4. Step 4: Simplify right side
    86,672.84x = 7,784,887,453.76
  5. Step 5: Solve for x
    x = 7,784,887,453.76/86,672.84
  6. Step 6: Final answer
    x = 89,819.23

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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.