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Finding the Fourth Proportional to 60,642.28, 90,811.50 and 38,388.52

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Solution

The fourth proportional to 60,642.28, 90,811.50 and 38,388.52 is: 57,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,642.28 : 90,811.50 = 38,388.52 : x
  2. Step 2: Convert to fraction form
    60,642.28/90,811.50 = 38,388.52/x
  3. Step 3: Cross multiply
    60,642.28x = 90,811.50 × 38,388.52
  4. Step 4: Simplify right side
    60,642.28x = 3,486,119,083.98
  5. Step 5: Solve for x
    x = 3,486,119,083.98/60,642.28
  6. Step 6: Final answer
    x = 57,486.61

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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.