Home / 125,983.20-188,756.10-81,587.10

Finding the Fourth Proportional to 125,983.20, 188,756.10 and 81,587.10

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Solution

The fourth proportional to 125,983.20, 188,756.10 and 81,587.10 is: 122,239.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,983.20 : 188,756.10 = 81,587.10 : x
  2. Step 2: Convert to fraction form
    125,983.20/188,756.10 = 81,587.10/x
  3. Step 3: Cross multiply
    125,983.20x = 188,756.10 × 81,587.10
  4. Step 4: Simplify right side
    125,983.20x = 15,400,062,806.31
  5. Step 5: Solve for x
    x = 15,400,062,806.31/125,983.20
  6. Step 6: Final answer
    x = 122,239.02

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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.