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Finding the Fourth Proportional to 250,719.71, 375,725.94 and 138,450.47

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Solution

The fourth proportional to 250,719.71, 375,725.94 and 138,450.47 is: 207,480.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,719.71 : 375,725.94 = 138,450.47 : x
  2. Step 2: Convert to fraction form
    250,719.71/375,725.94 = 138,450.47/x
  3. Step 3: Cross multiply
    250,719.71x = 375,725.94 × 138,450.47
  4. Step 4: Simplify right side
    250,719.71x = 52,019,432,984.19
  5. Step 5: Solve for x
    x = 52,019,432,984.19/250,719.71
  6. Step 6: Final answer
    x = 207,480.43

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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.