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Finding the Fourth Proportional to 91,472.30, 125,951.40 and 80,078.04

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Solution

The fourth proportional to 91,472.30, 125,951.40 and 80,078.04 is: 110,262.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,472.30 : 125,951.40 = 80,078.04 : x
  2. Step 2: Convert to fraction form
    91,472.30/125,951.40 = 80,078.04/x
  3. Step 3: Cross multiply
    91,472.30x = 125,951.40 × 80,078.04
  4. Step 4: Simplify right side
    91,472.30x = 10,085,941,247.26
  5. Step 5: Solve for x
    x = 10,085,941,247.26/91,472.30
  6. Step 6: Final answer
    x = 110,262.25

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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.