Home / 81,294.59-121,831.09-39,171.60

Finding the Fourth Proportional to 81,294.59, 121,831.09 and 39,171.60

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Solution

The fourth proportional to 81,294.59, 121,831.09 and 39,171.60 is: 58,704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,294.59 : 121,831.09 = 39,171.60 : x
  2. Step 2: Convert to fraction form
    81,294.59/121,831.09 = 39,171.60/x
  3. Step 3: Cross multiply
    81,294.59x = 121,831.09 × 39,171.60
  4. Step 4: Simplify right side
    81,294.59x = 4,772,318,627.12
  5. Step 5: Solve for x
    x = 4,772,318,627.12/81,294.59
  6. Step 6: Final answer
    x = 58,704.01

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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.