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Finding the Fourth Proportional to 261,681.80, 392,253.42 and 104,021.96

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Solution

The fourth proportional to 261,681.80, 392,253.42 and 104,021.96 is: 155,925.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,681.80 : 392,253.42 = 104,021.96 : x
  2. Step 2: Convert to fraction form
    261,681.80/392,253.42 = 104,021.96/x
  3. Step 3: Cross multiply
    261,681.80x = 392,253.42 × 104,021.96
  4. Step 4: Simplify right side
    261,681.80x = 40,802,969,565.10
  5. Step 5: Solve for x
    x = 40,802,969,565.10/261,681.80
  6. Step 6: Final answer
    x = 155,925.90

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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.