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Finding the Fourth Proportional to 261,833.81, 392,759.21 and 72,308.39

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Solution

The fourth proportional to 261,833.81, 392,759.21 and 72,308.39 is: 108,464.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,833.81 : 392,759.21 = 72,308.39 : x
  2. Step 2: Convert to fraction form
    261,833.81/392,759.21 = 72,308.39/x
  3. Step 3: Cross multiply
    261,833.81x = 392,759.21 × 72,308.39
  4. Step 4: Simplify right side
    261,833.81x = 28,399,784,349.75
  5. Step 5: Solve for x
    x = 28,399,784,349.75/261,833.81
  6. Step 6: Final answer
    x = 108,464.93

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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.