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Finding the Fourth Proportional to 261,614, 392,424.69 and 74,625.50

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Solution

The fourth proportional to 261,614, 392,424.69 and 74,625.50 is: 111,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,614 : 392,424.69 = 74,625.50 : x
  2. Step 2: Convert to fraction form
    261,614/392,424.69 = 74,625.50/x
  3. Step 3: Cross multiply
    261,614x = 392,424.69 × 74,625.50
  4. Step 4: Simplify right side
    261,614x = 29,284,888,703.60
  5. Step 5: Solve for x
    x = 29,284,888,703.60/261,614
  6. Step 6: Final answer
    x = 111,939.30

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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.