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Finding the Fourth Proportional to 329,129.50, 493,695.88 and 79,811.50

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Solution

The fourth proportional to 329,129.50, 493,695.88 and 79,811.50 is: 119,717.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,129.50 : 493,695.88 = 79,811.50 : x
  2. Step 2: Convert to fraction form
    329,129.50/493,695.88 = 79,811.50/x
  3. Step 3: Cross multiply
    329,129.50x = 493,695.88 × 79,811.50
  4. Step 4: Simplify right side
    329,129.50x = 39,402,608,726.62
  5. Step 5: Solve for x
    x = 39,402,608,726.62/329,129.50
  6. Step 6: Final answer
    x = 119,717.65

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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.