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Finding the Fourth Proportional to 91,375.40, 137,063.10 and 70,613.80

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Solution

The fourth proportional to 91,375.40, 137,063.10 and 70,613.80 is: 105,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,375.40 : 137,063.10 = 70,613.80 : x
  2. Step 2: Convert to fraction form
    91,375.40/137,063.10 = 70,613.80/x
  3. Step 3: Cross multiply
    91,375.40x = 137,063.10 × 70,613.80
  4. Step 4: Simplify right side
    91,375.40x = 9,678,546,330.78
  5. Step 5: Solve for x
    x = 9,678,546,330.78/91,375.40
  6. Step 6: Final answer
    x = 105,920.70

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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.