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Finding the Fourth Proportional to 261,667.89, 392,502.24 and 74,679.39

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Solution

The fourth proportional to 261,667.89, 392,502.24 and 74,679.39 is: 112,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,667.89 : 392,502.24 = 74,679.39 : x
  2. Step 2: Convert to fraction form
    261,667.89/392,502.24 = 74,679.39/x
  3. Step 3: Cross multiply
    261,667.89x = 392,502.24 × 74,679.39
  4. Step 4: Simplify right side
    261,667.89x = 29,311,827,856.83
  5. Step 5: Solve for x
    x = 29,311,827,856.83/261,667.89
  6. Step 6: Final answer
    x = 112,019.20

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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.