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Finding the Fourth Proportional to 261,870.10, 392,797.36 and 72,341.87

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Solution

The fourth proportional to 261,870.10, 392,797.36 and 72,341.87 is: 108,510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,870.10 : 392,797.36 = 72,341.87 : x
  2. Step 2: Convert to fraction form
    261,870.10/392,797.36 = 72,341.87/x
  3. Step 3: Cross multiply
    261,870.10x = 392,797.36 × 72,341.87
  4. Step 4: Simplify right side
    261,870.10x = 28,415,695,553.46
  5. Step 5: Solve for x
    x = 28,415,695,553.46/261,870.10
  6. Step 6: Final answer
    x = 108,510.65

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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.