Home / 90,671.40-125,107.20-54,854.28

Finding the Fourth Proportional to 90,671.40, 125,107.20 and 54,854.28

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Solution

The fourth proportional to 90,671.40, 125,107.20 and 54,854.28 is: 75,687.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,671.40 : 125,107.20 = 54,854.28 : x
  2. Step 2: Convert to fraction form
    90,671.40/125,107.20 = 54,854.28/x
  3. Step 3: Cross multiply
    90,671.40x = 125,107.20 × 54,854.28
  4. Step 4: Simplify right side
    90,671.40x = 6,862,665,378.82
  5. Step 5: Solve for x
    x = 6,862,665,378.82/90,671.40
  6. Step 6: Final answer
    x = 75,687.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.