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Finding the Fourth Proportional to 55,488.87, 83,241.59 and 20,425.86

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Solution

The fourth proportional to 55,488.87, 83,241.59 and 20,425.86 is: 30,641.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,488.87 : 83,241.59 = 20,425.86 : x
  2. Step 2: Convert to fraction form
    55,488.87/83,241.59 = 20,425.86/x
  3. Step 3: Cross multiply
    55,488.87x = 83,241.59 × 20,425.86
  4. Step 4: Simplify right side
    55,488.87x = 1,700,281,114.58
  5. Step 5: Solve for x
    x = 1,700,281,114.58/55,488.87
  6. Step 6: Final answer
    x = 30,641.84

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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.