Home / 121,510.20-182,265.30-91,985.70

Finding the Fourth Proportional to 121,510.20, 182,265.30 and 91,985.70

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Solution

The fourth proportional to 121,510.20, 182,265.30 and 91,985.70 is: 137,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,510.20 : 182,265.30 = 91,985.70 : x
  2. Step 2: Convert to fraction form
    121,510.20/182,265.30 = 91,985.70/x
  3. Step 3: Cross multiply
    121,510.20x = 182,265.30 × 91,985.70
  4. Step 4: Simplify right side
    121,510.20x = 16,765,801,206.21
  5. Step 5: Solve for x
    x = 16,765,801,206.21/121,510.20
  6. Step 6: Final answer
    x = 137,978.55

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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.