Home / 81,332.64-121,949.52-33,890.40

Finding the Fourth Proportional to 81,332.64, 121,949.52 and 33,890.40

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Solution

The fourth proportional to 81,332.64, 121,949.52 and 33,890.40 is: 50,815.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,332.64 : 121,949.52 = 33,890.40 : x
  2. Step 2: Convert to fraction form
    81,332.64/121,949.52 = 33,890.40/x
  3. Step 3: Cross multiply
    81,332.64x = 121,949.52 × 33,890.40
  4. Step 4: Simplify right side
    81,332.64x = 4,132,918,012.61
  5. Step 5: Solve for x
    x = 4,132,918,012.61/81,332.64
  6. Step 6: Final answer
    x = 50,815.00

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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.