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Finding the Fourth Proportional to 91,961.60, 126,931.20 and 54,248

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Solution

The fourth proportional to 91,961.60, 126,931.20 and 54,248 is: 74,876.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,961.60 : 126,931.20 = 54,248 : x
  2. Step 2: Convert to fraction form
    91,961.60/126,931.20 = 54,248/x
  3. Step 3: Cross multiply
    91,961.60x = 126,931.20 × 54,248
  4. Step 4: Simplify right side
    91,961.60x = 6,885,763,737.60
  5. Step 5: Solve for x
    x = 6,885,763,737.60/91,961.60
  6. Step 6: Final answer
    x = 74,876.51

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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.