Home / 81,429.22-121,901.37-72,876.35

Finding the Fourth Proportional to 81,429.22, 121,901.37 and 72,876.35

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Solution

The fourth proportional to 81,429.22, 121,901.37 and 72,876.35 is: 109,097.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,429.22 : 121,901.37 = 72,876.35 : x
  2. Step 2: Convert to fraction form
    81,429.22/121,901.37 = 72,876.35/x
  3. Step 3: Cross multiply
    81,429.22x = 121,901.37 × 72,876.35
  4. Step 4: Simplify right side
    81,429.22x = 8,883,726,182.43
  5. Step 5: Solve for x
    x = 8,883,726,182.43/81,429.22
  6. Step 6: Final answer
    x = 109,097.52

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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.