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Finding the Fourth Proportional to 129,685.95, 179,000.73 and 84,487.95

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Solution

The fourth proportional to 129,685.95, 179,000.73 and 84,487.95 is: 116,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,685.95 : 179,000.73 = 84,487.95 : x
  2. Step 2: Convert to fraction form
    129,685.95/179,000.73 = 84,487.95/x
  3. Step 3: Cross multiply
    129,685.95x = 179,000.73 × 84,487.95
  4. Step 4: Simplify right side
    129,685.95x = 15,123,404,726.20
  5. Step 5: Solve for x
    x = 15,123,404,726.20/129,685.95
  6. Step 6: Final answer
    x = 116,615.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.