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Finding the Fourth Proportional to 60,711.80, 91,067.70 and 31,187.30

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Solution

The fourth proportional to 60,711.80, 91,067.70 and 31,187.30 is: 46,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,711.80 : 91,067.70 = 31,187.30 : x
  2. Step 2: Convert to fraction form
    60,711.80/91,067.70 = 31,187.30/x
  3. Step 3: Cross multiply
    60,711.80x = 91,067.70 × 31,187.30
  4. Step 4: Simplify right side
    60,711.80x = 2,840,155,680.21
  5. Step 5: Solve for x
    x = 2,840,155,680.21/60,711.80
  6. Step 6: Final answer
    x = 46,780.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.