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Finding the Fourth Proportional to 91,670.40, 137,519.84 and 39,080

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Solution

The fourth proportional to 91,670.40, 137,519.84 and 39,080 is: 58,626.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,670.40 : 137,519.84 = 39,080 : x
  2. Step 2: Convert to fraction form
    91,670.40/137,519.84 = 39,080/x
  3. Step 3: Cross multiply
    91,670.40x = 137,519.84 × 39,080
  4. Step 4: Simplify right side
    91,670.40x = 5,374,275,347.20
  5. Step 5: Solve for x
    x = 5,374,275,347.20/91,670.40
  6. Step 6: Final answer
    x = 58,626.07

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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.