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Finding the Fourth Proportional to 261,369.56, 391,876.92 and 132,970.28

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Solution

The fourth proportional to 261,369.56, 391,876.92 and 132,970.28 is: 199,365.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,369.56 : 391,876.92 = 132,970.28 : x
  2. Step 2: Convert to fraction form
    261,369.56/391,876.92 = 132,970.28/x
  3. Step 3: Cross multiply
    261,369.56x = 391,876.92 × 132,970.28
  4. Step 4: Simplify right side
    261,369.56x = 52,107,983,777.94
  5. Step 5: Solve for x
    x = 52,107,983,777.94/261,369.56
  6. Step 6: Final answer
    x = 199,365.16

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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.