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Finding the Fourth Proportional to 261,662.78, 392,245.00 and 84,045.25

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Solution

The fourth proportional to 261,662.78, 392,245.00 and 84,045.25 is: 125,987.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,662.78 : 392,245.00 = 84,045.25 : x
  2. Step 2: Convert to fraction form
    261,662.78/392,245.00 = 84,045.25/x
  3. Step 3: Cross multiply
    261,662.78x = 392,245.00 × 84,045.25
  4. Step 4: Simplify right side
    261,662.78x = 32,966,329,681.61
  5. Step 5: Solve for x
    x = 32,966,329,681.61/261,662.78
  6. Step 6: Final answer
    x = 125,987.85

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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.