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Finding the Fourth Proportional to 261,045.43, 391,568.46 and 71,507.43

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Solution

The fourth proportional to 261,045.43, 391,568.46 and 71,507.43 is: 107,261.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,045.43 : 391,568.46 = 71,507.43 : x
  2. Step 2: Convert to fraction form
    261,045.43/391,568.46 = 71,507.43/x
  3. Step 3: Cross multiply
    261,045.43x = 391,568.46 × 71,507.43
  4. Step 4: Simplify right side
    261,045.43x = 28,000,053,886.12
  5. Step 5: Solve for x
    x = 28,000,053,886.12/261,045.43
  6. Step 6: Final answer
    x = 107,261.23

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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.