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Finding the Fourth Proportional to 125,630.40, 188,251.20 and 84,028.80

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Solution

The fourth proportional to 125,630.40, 188,251.20 and 84,028.80 is: 125,913.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,630.40 : 188,251.20 = 84,028.80 : x
  2. Step 2: Convert to fraction form
    125,630.40/188,251.20 = 84,028.80/x
  3. Step 3: Cross multiply
    125,630.40x = 188,251.20 × 84,028.80
  4. Step 4: Simplify right side
    125,630.40x = 15,818,522,434.56
  5. Step 5: Solve for x
    x = 15,818,522,434.56/125,630.40
  6. Step 6: Final answer
    x = 125,913.17

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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.