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Finding the Fourth Proportional to 261,885.11, 392,850.32 and 72,345.42

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Solution

The fourth proportional to 261,885.11, 392,850.32 and 72,345.42 is: 108,524.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,885.11 : 392,850.32 = 72,345.42 : x
  2. Step 2: Convert to fraction form
    261,885.11/392,850.32 = 72,345.42/x
  3. Step 3: Cross multiply
    261,885.11x = 392,850.32 × 72,345.42
  4. Step 4: Simplify right side
    261,885.11x = 28,420,921,035.81
  5. Step 5: Solve for x
    x = 28,420,921,035.81/261,885.11
  6. Step 6: Final answer
    x = 108,524.39

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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.