Home / 81,043.60-121,528.92-34,272.40

Finding the Fourth Proportional to 81,043.60, 121,528.92 and 34,272.40

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Solution

The fourth proportional to 81,043.60, 121,528.92 and 34,272.40 is: 51,393.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,043.60 : 121,528.92 = 34,272.40 : x
  2. Step 2: Convert to fraction form
    81,043.60/121,528.92 = 34,272.40/x
  3. Step 3: Cross multiply
    81,043.60x = 121,528.92 × 34,272.40
  4. Step 4: Simplify right side
    81,043.60x = 4,165,087,757.81
  5. Step 5: Solve for x
    x = 4,165,087,757.81/81,043.60
  6. Step 6: Final answer
    x = 51,393.17

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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.