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Finding the Fourth Proportional to 129,554.61, 193,892.99 and 79,666.30

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Solution

The fourth proportional to 129,554.61, 193,892.99 and 79,666.30 is: 119,229.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,554.61 : 193,892.99 = 79,666.30 : x
  2. Step 2: Convert to fraction form
    129,554.61/193,892.99 = 79,666.30/x
  3. Step 3: Cross multiply
    129,554.61x = 193,892.99 × 79,666.30
  4. Step 4: Simplify right side
    129,554.61x = 15,446,737,401.39
  5. Step 5: Solve for x
    x = 15,446,737,401.39/129,554.61
  6. Step 6: Final answer
    x = 119,229.55

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1.5x scale

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.