Home / 71,915.40-99,178.62-45,060.78

Finding the Fourth Proportional to 71,915.40, 99,178.62 and 45,060.78

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Solution

The fourth proportional to 71,915.40, 99,178.62 and 45,060.78 is: 62,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.40 : 99,178.62 = 45,060.78 : x
  2. Step 2: Convert to fraction form
    71,915.40/99,178.62 = 45,060.78/x
  3. Step 3: Cross multiply
    71,915.40x = 99,178.62 × 45,060.78
  4. Step 4: Simplify right side
    71,915.40x = 4,469,065,976.52
  5. Step 5: Solve for x
    x = 4,469,065,976.52/71,915.40
  6. Step 6: Final answer
    x = 62,143.38

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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.