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Finding the Fourth Proportional to 261,804.56, 392,715.34 and 72,279.14

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Solution

The fourth proportional to 261,804.56, 392,715.34 and 72,279.14 is: 108,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,804.56 : 392,715.34 = 72,279.14 : x
  2. Step 2: Convert to fraction form
    261,804.56/392,715.34 = 72,279.14/x
  3. Step 3: Cross multiply
    261,804.56x = 392,715.34 × 72,279.14
  4. Step 4: Simplify right side
    261,804.56x = 28,385,124,895.73
  5. Step 5: Solve for x
    x = 28,385,124,895.73/261,804.56
  6. Step 6: Final answer
    x = 108,421.05

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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.