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Finding the Fourth Proportional to 67,433.90, 101,138.70 and 42,429.20

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Solution

The fourth proportional to 67,433.90, 101,138.70 and 42,429.20 is: 63,636.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,433.90 : 101,138.70 = 42,429.20 : x
  2. Step 2: Convert to fraction form
    67,433.90/101,138.70 = 42,429.20/x
  3. Step 3: Cross multiply
    67,433.90x = 101,138.70 × 42,429.20
  4. Step 4: Simplify right side
    67,433.90x = 4,291,234,130.04
  5. Step 5: Solve for x
    x = 4,291,234,130.04/67,433.90
  6. Step 6: Final answer
    x = 63,636.16

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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.