Home / 125,629.80-188,153.10-85,972.20

Finding the Fourth Proportional to 125,629.80, 188,153.10 and 85,972.20

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Solution

The fourth proportional to 125,629.80, 188,153.10 and 85,972.20 is: 128,758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,629.80 : 188,153.10 = 85,972.20 : x
  2. Step 2: Convert to fraction form
    125,629.80/188,153.10 = 85,972.20/x
  3. Step 3: Cross multiply
    125,629.80x = 188,153.10 × 85,972.20
  4. Step 4: Simplify right side
    125,629.80x = 16,175,935,943.82
  5. Step 5: Solve for x
    x = 16,175,935,943.82/125,629.80
  6. Step 6: Final answer
    x = 128,758.75

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1.5x scale

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.