Home / 81,278.64-121,969.80-34,531.52

Finding the Fourth Proportional to 81,278.64, 121,969.80 and 34,531.52

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Solution

The fourth proportional to 81,278.64, 121,969.80 and 34,531.52 is: 51,819.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.64 : 121,969.80 = 34,531.52 : x
  2. Step 2: Convert to fraction form
    81,278.64/121,969.80 = 34,531.52/x
  3. Step 3: Cross multiply
    81,278.64x = 121,969.80 × 34,531.52
  4. Step 4: Simplify right side
    81,278.64x = 4,211,801,978.25
  5. Step 5: Solve for x
    x = 4,211,801,978.25/81,278.64
  6. Step 6: Final answer
    x = 51,819.30

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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.