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Finding the Fourth Proportional to 91,893.40, 137,657.85 and 80,934.10

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Solution

The fourth proportional to 91,893.40, 137,657.85 and 80,934.10 is: 121,240.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,893.40 : 137,657.85 = 80,934.10 : x
  2. Step 2: Convert to fraction form
    91,893.40/137,657.85 = 80,934.10/x
  3. Step 3: Cross multiply
    91,893.40x = 137,657.85 × 80,934.10
  4. Step 4: Simplify right side
    91,893.40x = 11,141,214,197.69
  5. Step 5: Solve for x
    x = 11,141,214,197.69/91,893.40
  6. Step 6: Final answer
    x = 121,240.64

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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.