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Finding the Fourth Proportional to 67,211.70, 100,817.55 and 63,931.20

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Solution

The fourth proportional to 67,211.70, 100,817.55 and 63,931.20 is: 95,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,211.70 : 100,817.55 = 63,931.20 : x
  2. Step 2: Convert to fraction form
    67,211.70/100,817.55 = 63,931.20/x
  3. Step 3: Cross multiply
    67,211.70x = 100,817.55 × 63,931.20
  4. Step 4: Simplify right side
    67,211.70x = 6,445,386,952.56
  5. Step 5: Solve for x
    x = 6,445,386,952.56/67,211.70
  6. Step 6: Final answer
    x = 95,896.80

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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.