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Finding the Fourth Proportional to 67,402.40, 101,108.40 and 20,655.20

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Solution

The fourth proportional to 67,402.40, 101,108.40 and 20,655.20 is: 30,984.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,402.40 : 101,108.40 = 20,655.20 : x
  2. Step 2: Convert to fraction form
    67,402.40/101,108.40 = 20,655.20/x
  3. Step 3: Cross multiply
    67,402.40x = 101,108.40 × 20,655.20
  4. Step 4: Simplify right side
    67,402.40x = 2,088,414,223.68
  5. Step 5: Solve for x
    x = 2,088,414,223.68/67,402.40
  6. Step 6: Final answer
    x = 30,984.27

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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.