Home / 91,763.20-137,725.80-54,276.40

Finding the Fourth Proportional to 91,763.20, 137,725.80 and 54,276.40

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Solution

The fourth proportional to 91,763.20, 137,725.80 and 54,276.40 is: 81,462.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,763.20 : 137,725.80 = 54,276.40 : x
  2. Step 2: Convert to fraction form
    91,763.20/137,725.80 = 54,276.40/x
  3. Step 3: Cross multiply
    91,763.20x = 137,725.80 × 54,276.40
  4. Step 4: Simplify right side
    91,763.20x = 7,475,260,611.12
  5. Step 5: Solve for x
    x = 7,475,260,611.12/91,763.20
  6. Step 6: Final answer
    x = 81,462.51

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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.