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Finding the Fourth Proportional to 80,855.40, 121,167.90 and 59,629.80

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Solution

The fourth proportional to 80,855.40, 121,167.90 and 59,629.80 is: 89,359.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,855.40 : 121,167.90 = 59,629.80 : x
  2. Step 2: Convert to fraction form
    80,855.40/121,167.90 = 59,629.80/x
  3. Step 3: Cross multiply
    80,855.40x = 121,167.90 × 59,629.80
  4. Step 4: Simplify right side
    80,855.40x = 7,225,217,643.42
  5. Step 5: Solve for x
    x = 7,225,217,643.42/80,855.40
  6. Step 6: Final answer
    x = 89,359.74

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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.