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Finding the Fourth Proportional to 261,711.68, 392,580.64 and 74,750.72

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Solution

The fourth proportional to 261,711.68, 392,580.64 and 74,750.72 is: 112,129.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,711.68 : 392,580.64 = 74,750.72 : x
  2. Step 2: Convert to fraction form
    261,711.68/392,580.64 = 74,750.72/x
  3. Step 3: Cross multiply
    261,711.68x = 392,580.64 × 74,750.72
  4. Step 4: Simplify right side
    261,711.68x = 29,345,685,498.06
  5. Step 5: Solve for x
    x = 29,345,685,498.06/261,711.68
  6. Step 6: Final answer
    x = 112,129.83

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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.