Home / 67,221.20-92,759.76-38,928.72

Finding the Fourth Proportional to 67,221.20, 92,759.76 and 38,928.72

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Solution

The fourth proportional to 67,221.20, 92,759.76 and 38,928.72 is: 53,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,221.20 : 92,759.76 = 38,928.72 : x
  2. Step 2: Convert to fraction form
    67,221.20/92,759.76 = 38,928.72/x
  3. Step 3: Cross multiply
    67,221.20x = 92,759.76 × 38,928.72
  4. Step 4: Simplify right side
    67,221.20x = 3,611,018,724.31
  5. Step 5: Solve for x
    x = 3,611,018,724.31/67,221.20
  6. Step 6: Final answer
    x = 53,718.45

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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.