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Finding the Fourth Proportional to 91,859.80, 137,643.90 and 60,658.60

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Solution

The fourth proportional to 91,859.80, 137,643.90 and 60,658.60 is: 90,891.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,859.80 : 137,643.90 = 60,658.60 : x
  2. Step 2: Convert to fraction form
    91,859.80/137,643.90 = 60,658.60/x
  3. Step 3: Cross multiply
    91,859.80x = 137,643.90 × 60,658.60
  4. Step 4: Simplify right side
    91,859.80x = 8,349,286,272.54
  5. Step 5: Solve for x
    x = 8,349,286,272.54/91,859.80
  6. Step 6: Final answer
    x = 90,891.62

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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.