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Finding the Fourth Proportional to 75,686.40, 113,432.40 and 58,068.90

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Solution

The fourth proportional to 75,686.40, 113,432.40 and 58,068.90 is: 87,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,686.40 : 113,432.40 = 58,068.90 : x
  2. Step 2: Convert to fraction form
    75,686.40/113,432.40 = 58,068.90/x
  3. Step 3: Cross multiply
    75,686.40x = 113,432.40 × 58,068.90
  4. Step 4: Simplify right side
    75,686.40x = 6,586,894,692.36
  5. Step 5: Solve for x
    x = 6,586,894,692.36/75,686.40
  6. Step 6: Final answer
    x = 87,028.78

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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.