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Finding the Fourth Proportional to 98,944.80, 136,551.60 and 61,231.20

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Solution

The fourth proportional to 98,944.80, 136,551.60 and 61,231.20 is: 84,503.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,944.80 : 136,551.60 = 61,231.20 : x
  2. Step 2: Convert to fraction form
    98,944.80/136,551.60 = 61,231.20/x
  3. Step 3: Cross multiply
    98,944.80x = 136,551.60 × 61,231.20
  4. Step 4: Simplify right side
    98,944.80x = 8,361,218,329.92
  5. Step 5: Solve for x
    x = 8,361,218,329.92/98,944.80
  6. Step 6: Final answer
    x = 84,503.87

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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.