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Finding the Fourth Proportional to 129,613.62, 178,866.81 and 69,997.62

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Solution

The fourth proportional to 129,613.62, 178,866.81 and 69,997.62 is: 96,596.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,613.62 : 178,866.81 = 69,997.62 : x
  2. Step 2: Convert to fraction form
    129,613.62/178,866.81 = 69,997.62/x
  3. Step 3: Cross multiply
    129,613.62x = 178,866.81 × 69,997.62
  4. Step 4: Simplify right side
    129,613.62x = 12,520,250,996.99
  5. Step 5: Solve for x
    x = 12,520,250,996.99/129,613.62
  6. Step 6: Final answer
    x = 96,596.72

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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.