Home / 81,478.19-122,219.85-25,318.60

Finding the Fourth Proportional to 81,478.19, 122,219.85 and 25,318.60

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Solution

The fourth proportional to 81,478.19, 122,219.85 and 25,318.60 is: 37,978.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.19 : 122,219.85 = 25,318.60 : x
  2. Step 2: Convert to fraction form
    81,478.19/122,219.85 = 25,318.60/x
  3. Step 3: Cross multiply
    81,478.19x = 122,219.85 × 25,318.60
  4. Step 4: Simplify right side
    81,478.19x = 3,094,435,283.61
  5. Step 5: Solve for x
    x = 3,094,435,283.61/81,478.19
  6. Step 6: Final answer
    x = 37,978.69

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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.