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Finding the Fourth Proportional to 112,793.79, 155,648.19 and 61,805.91

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Solution

The fourth proportional to 112,793.79, 155,648.19 and 61,805.91 is: 85,288.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,793.79 : 155,648.19 = 61,805.91 : x
  2. Step 2: Convert to fraction form
    112,793.79/155,648.19 = 61,805.91/x
  3. Step 3: Cross multiply
    112,793.79x = 155,648.19 × 61,805.91
  4. Step 4: Simplify right side
    112,793.79x = 9,619,978,022.80
  5. Step 5: Solve for x
    x = 9,619,978,022.80/112,793.79
  6. Step 6: Final answer
    x = 85,288.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.