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Finding the Fourth Proportional to 138,191.45, 207,323.37 and 43,417.80

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Solution

The fourth proportional to 138,191.45, 207,323.37 and 43,417.80 is: 65,138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,191.45 : 207,323.37 = 43,417.80 : x
  2. Step 2: Convert to fraction form
    138,191.45/207,323.37 = 43,417.80/x
  3. Step 3: Cross multiply
    138,191.45x = 207,323.37 × 43,417.80
  4. Step 4: Simplify right side
    138,191.45x = 9,001,524,613.99
  5. Step 5: Solve for x
    x = 9,001,524,613.99/138,191.45
  6. Step 6: Final answer
    x = 65,138.07

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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.