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Finding the Fourth Proportional to 138,047.68, 207,065.58 and 43,275.75

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Solution

The fourth proportional to 138,047.68, 207,065.58 and 43,275.75 is: 64,911.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,047.68 : 207,065.58 = 43,275.75 : x
  2. Step 2: Convert to fraction form
    138,047.68/207,065.58 = 43,275.75/x
  3. Step 3: Cross multiply
    138,047.68x = 207,065.58 × 43,275.75
  4. Step 4: Simplify right side
    138,047.68x = 8,960,918,273.69
  5. Step 5: Solve for x
    x = 8,960,918,273.69/138,047.68
  6. Step 6: Final answer
    x = 64,911.76

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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.