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Finding the Fourth Proportional to 60,565.61, 90,860.57 and 21,112.13

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Solution

The fourth proportional to 60,565.61, 90,860.57 and 21,112.13 is: 31,672.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,565.61 : 90,860.57 = 21,112.13 : x
  2. Step 2: Convert to fraction form
    60,565.61/90,860.57 = 21,112.13/x
  3. Step 3: Cross multiply
    60,565.61x = 90,860.57 × 21,112.13
  4. Step 4: Simplify right side
    60,565.61x = 1,918,259,605.85
  5. Step 5: Solve for x
    x = 1,918,259,605.85/60,565.61
  6. Step 6: Final answer
    x = 31,672.43

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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.