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Finding the Fourth Proportional to 91,972.80, 126,920.52 and 54,259.20

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Solution

The fourth proportional to 91,972.80, 126,920.52 and 54,259.20 is: 74,876.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,972.80 : 126,920.52 = 54,259.20 : x
  2. Step 2: Convert to fraction form
    91,972.80/126,920.52 = 54,259.20/x
  3. Step 3: Cross multiply
    91,972.80x = 126,920.52 × 54,259.20
  4. Step 4: Simplify right side
    91,972.80x = 6,886,605,878.78
  5. Step 5: Solve for x
    x = 6,886,605,878.78/91,972.80
  6. Step 6: Final answer
    x = 74,876.55

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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.