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Finding the Fourth Proportional to 89,479.34, 133,926.95 and 65,780.61

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Solution

The fourth proportional to 89,479.34, 133,926.95 and 65,780.61 is: 98,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,479.34 : 133,926.95 = 65,780.61 : x
  2. Step 2: Convert to fraction form
    89,479.34/133,926.95 = 65,780.61/x
  3. Step 3: Cross multiply
    89,479.34x = 133,926.95 × 65,780.61
  4. Step 4: Simplify right side
    89,479.34x = 8,809,796,384.21
  5. Step 5: Solve for x
    x = 8,809,796,384.21/89,479.34
  6. Step 6: Final answer
    x = 98,456.21

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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.