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Finding the Fourth Proportional to 261,876.32, 392,806.70 and 72,348.06

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Solution

The fourth proportional to 261,876.32, 392,806.70 and 72,348.06 is: 108,519.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,876.32 : 392,806.70 = 72,348.06 : x
  2. Step 2: Convert to fraction form
    261,876.32/392,806.70 = 72,348.06/x
  3. Step 3: Cross multiply
    261,876.32x = 392,806.70 × 72,348.06
  4. Step 4: Simplify right side
    261,876.32x = 28,418,802,700.00
  5. Step 5: Solve for x
    x = 28,418,802,700.00/261,876.32
  6. Step 6: Final answer
    x = 108,519.94

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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.