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Finding the Fourth Proportional to 91,689.60, 137,728.80 and 88,384.80

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Solution

The fourth proportional to 91,689.60, 137,728.80 and 88,384.80 is: 132,764.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,689.60 : 137,728.80 = 88,384.80 : x
  2. Step 2: Convert to fraction form
    91,689.60/137,728.80 = 88,384.80/x
  3. Step 3: Cross multiply
    91,689.60x = 137,728.80 × 88,384.80
  4. Step 4: Simplify right side
    91,689.60x = 12,173,132,442.24
  5. Step 5: Solve for x
    x = 12,173,132,442.24/91,689.60
  6. Step 6: Final answer
    x = 132,764.59

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1.5x scale

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.