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Finding the Fourth Proportional to 60,758.80, 91,065.30 and 31,161.40

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Solution

The fourth proportional to 60,758.80, 91,065.30 and 31,161.40 is: 46,704.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,758.80 : 91,065.30 = 31,161.40 : x
  2. Step 2: Convert to fraction form
    60,758.80/91,065.30 = 31,161.40/x
  3. Step 3: Cross multiply
    60,758.80x = 91,065.30 × 31,161.40
  4. Step 4: Simplify right side
    60,758.80x = 2,837,722,239.42
  5. Step 5: Solve for x
    x = 2,837,722,239.42/60,758.80
  6. Step 6: Final answer
    x = 46,704.71

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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.