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Finding the Fourth Proportional to 60,310.60, 90,402.01 and 20,291.47

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Solution

The fourth proportional to 60,310.60, 90,402.01 and 20,291.47 is: 30,415.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,310.60 : 90,402.01 = 20,291.47 : x
  2. Step 2: Convert to fraction form
    60,310.60/90,402.01 = 20,291.47/x
  3. Step 3: Cross multiply
    60,310.60x = 90,402.01 × 20,291.47
  4. Step 4: Simplify right side
    60,310.60x = 1,834,389,397.12
  5. Step 5: Solve for x
    x = 1,834,389,397.12/60,310.60
  6. Step 6: Final answer
    x = 30,415.71

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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.