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Finding the Fourth Proportional to 61,247.40, 91,784.89 and 48,711.79

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Solution

The fourth proportional to 61,247.40, 91,784.89 and 48,711.79 is: 72,999.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,247.40 : 91,784.89 = 48,711.79 : x
  2. Step 2: Convert to fraction form
    61,247.40/91,784.89 = 48,711.79/x
  3. Step 3: Cross multiply
    61,247.40x = 91,784.89 × 48,711.79
  4. Step 4: Simplify right side
    61,247.40x = 4,471,006,286.85
  5. Step 5: Solve for x
    x = 4,471,006,286.85/61,247.40
  6. Step 6: Final answer
    x = 72,999.12

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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.