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Finding the Fourth Proportional to 138,002.80, 207,004.20 and 43,240.90

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Solution

The fourth proportional to 138,002.80, 207,004.20 and 43,240.90 is: 64,861.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,002.80 : 207,004.20 = 43,240.90 : x
  2. Step 2: Convert to fraction form
    138,002.80/207,004.20 = 43,240.90/x
  3. Step 3: Cross multiply
    138,002.80x = 207,004.20 × 43,240.90
  4. Step 4: Simplify right side
    138,002.80x = 8,951,047,911.78
  5. Step 5: Solve for x
    x = 8,951,047,911.78/138,002.80
  6. Step 6: Final answer
    x = 64,861.35

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1.5x scale

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.