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Finding the Fourth Proportional to 129,250.85, 178,363.04 and 71,889.98

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Solution

The fourth proportional to 129,250.85, 178,363.04 and 71,889.98 is: 99,206.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,250.85 : 178,363.04 = 71,889.98 : x
  2. Step 2: Convert to fraction form
    129,250.85/178,363.04 = 71,889.98/x
  3. Step 3: Cross multiply
    129,250.85x = 178,363.04 × 71,889.98
  4. Step 4: Simplify right side
    129,250.85x = 12,822,514,127.07
  5. Step 5: Solve for x
    x = 12,822,514,127.07/129,250.85
  6. Step 6: Final answer
    x = 99,206.42

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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.