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Finding the Fourth Proportional to 60,090.72, 90,142.20 and 20,642.72

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Solution

The fourth proportional to 60,090.72, 90,142.20 and 20,642.72 is: 30,966.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,090.72 : 90,142.20 = 20,642.72 : x
  2. Step 2: Convert to fraction form
    60,090.72/90,142.20 = 20,642.72/x
  3. Step 3: Cross multiply
    60,090.72x = 90,142.20 × 20,642.72
  4. Step 4: Simplify right side
    60,090.72x = 1,860,780,194.78
  5. Step 5: Solve for x
    x = 1,860,780,194.78/60,090.72
  6. Step 6: Final answer
    x = 30,966.18

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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.