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Finding the Fourth Proportional to 138,568.71, 207,856.93 and 45,074.46

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Solution

The fourth proportional to 138,568.71, 207,856.93 and 45,074.46 is: 67,612.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,568.71 : 207,856.93 = 45,074.46 : x
  2. Step 2: Convert to fraction form
    138,568.71/207,856.93 = 45,074.46/x
  3. Step 3: Cross multiply
    138,568.71x = 207,856.93 × 45,074.46
  4. Step 4: Simplify right side
    138,568.71x = 9,369,038,877.01
  5. Step 5: Solve for x
    x = 9,369,038,877.01/138,568.71
  6. Step 6: Final answer
    x = 67,612.95

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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.