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Finding the Fourth Proportional to 261,359.91, 391,993.02 and 69,235.61

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Solution

The fourth proportional to 261,359.91, 391,993.02 and 69,235.61 is: 103,841.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,359.91 : 391,993.02 = 69,235.61 : x
  2. Step 2: Convert to fraction form
    261,359.91/391,993.02 = 69,235.61/x
  3. Step 3: Cross multiply
    261,359.91x = 391,993.02 × 69,235.61
  4. Step 4: Simplify right side
    261,359.91x = 27,139,873,895.48
  5. Step 5: Solve for x
    x = 27,139,873,895.48/261,359.91
  6. Step 6: Final answer
    x = 103,841.00

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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.