Home / 80,890.60-111,631.14-45,078.76

Finding the Fourth Proportional to 80,890.60, 111,631.14 and 45,078.76

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Solution

The fourth proportional to 80,890.60, 111,631.14 and 45,078.76 is: 62,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,890.60 : 111,631.14 = 45,078.76 : x
  2. Step 2: Convert to fraction form
    80,890.60/111,631.14 = 45,078.76/x
  3. Step 3: Cross multiply
    80,890.60x = 111,631.14 × 45,078.76
  4. Step 4: Simplify right side
    80,890.60x = 5,032,193,368.59
  5. Step 5: Solve for x
    x = 5,032,193,368.59/80,890.60
  6. Step 6: Final answer
    x = 62,209.87

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1.5x scale

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.