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Finding the Fourth Proportional to 125,805.40, 188,708.10 and 69,818.20

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Solution

The fourth proportional to 125,805.40, 188,708.10 and 69,818.20 is: 104,727.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,805.40 : 188,708.10 = 69,818.20 : x
  2. Step 2: Convert to fraction form
    125,805.40/188,708.10 = 69,818.20/x
  3. Step 3: Cross multiply
    125,805.40x = 188,708.10 × 69,818.20
  4. Step 4: Simplify right side
    125,805.40x = 13,175,259,867.42
  5. Step 5: Solve for x
    x = 13,175,259,867.42/125,805.40
  6. Step 6: Final answer
    x = 104,727.30

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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.