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Finding the Fourth Proportional to 261,700.79, 392,553.59 and 72,164.43

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Solution

The fourth proportional to 261,700.79, 392,553.59 and 72,164.43 is: 108,247.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,700.79 : 392,553.59 = 72,164.43 : x
  2. Step 2: Convert to fraction form
    261,700.79/392,553.59 = 72,164.43/x
  3. Step 3: Cross multiply
    261,700.79x = 392,553.59 × 72,164.43
  4. Step 4: Simplify right side
    261,700.79x = 28,328,405,705.98
  5. Step 5: Solve for x
    x = 28,328,405,705.98/261,700.79
  6. Step 6: Final answer
    x = 108,247.31

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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.