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Finding the Fourth Proportional to 79,931.70, 119,897.55 and 67,101.30

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Solution

The fourth proportional to 79,931.70, 119,897.55 and 67,101.30 is: 100,651.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,931.70 : 119,897.55 = 67,101.30 : x
  2. Step 2: Convert to fraction form
    79,931.70/119,897.55 = 67,101.30/x
  3. Step 3: Cross multiply
    79,931.70x = 119,897.55 × 67,101.30
  4. Step 4: Simplify right side
    79,931.70x = 8,045,281,471.82
  5. Step 5: Solve for x
    x = 8,045,281,471.82/79,931.70
  6. Step 6: Final answer
    x = 100,651.95

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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.