Home / 91,837.60-137,464.80-84,839.20

Finding the Fourth Proportional to 91,837.60, 137,464.80 and 84,839.20

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Solution

The fourth proportional to 91,837.60, 137,464.80 and 84,839.20 is: 126,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,837.60 : 137,464.80 = 84,839.20 : x
  2. Step 2: Convert to fraction form
    91,837.60/137,464.80 = 84,839.20/x
  3. Step 3: Cross multiply
    91,837.60x = 137,464.80 × 84,839.20
  4. Step 4: Simplify right side
    91,837.60x = 11,662,403,660.16
  5. Step 5: Solve for x
    x = 11,662,403,660.16/91,837.60
  6. Step 6: Final answer
    x = 126,989.42

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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.