Home / 80,947.40-121,530.45-51,422.90

Finding the Fourth Proportional to 80,947.40, 121,530.45 and 51,422.90

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Solution

The fourth proportional to 80,947.40, 121,530.45 and 51,422.90 is: 77,203.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,947.40 : 121,530.45 = 51,422.90 : x
  2. Step 2: Convert to fraction form
    80,947.40/121,530.45 = 51,422.90/x
  3. Step 3: Cross multiply
    80,947.40x = 121,530.45 × 51,422.90
  4. Step 4: Simplify right side
    80,947.40x = 6,249,448,177.31
  5. Step 5: Solve for x
    x = 6,249,448,177.31/80,947.40
  6. Step 6: Final answer
    x = 77,203.82

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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.