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Finding the Fourth Proportional to 100,508.70, 138,692.18 and 58,066.32

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Solution

The fourth proportional to 100,508.70, 138,692.18 and 58,066.32 is: 80,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,508.70 : 138,692.18 = 58,066.32 : x
  2. Step 2: Convert to fraction form
    100,508.70/138,692.18 = 58,066.32/x
  3. Step 3: Cross multiply
    100,508.70x = 138,692.18 × 58,066.32
  4. Step 4: Simplify right side
    100,508.70x = 8,053,344,505.38
  5. Step 5: Solve for x
    x = 8,053,344,505.38/100,508.70
  6. Step 6: Final answer
    x = 80,125.84

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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.