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Finding the Fourth Proportional to 125,764.40, 188,646.60 and 66,715.40

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Solution

The fourth proportional to 125,764.40, 188,646.60 and 66,715.40 is: 100,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,764.40 : 188,646.60 = 66,715.40 : x
  2. Step 2: Convert to fraction form
    125,764.40/188,646.60 = 66,715.40/x
  3. Step 3: Cross multiply
    125,764.40x = 188,646.60 × 66,715.40
  4. Step 4: Simplify right side
    125,764.40x = 12,585,633,377.64
  5. Step 5: Solve for x
    x = 12,585,633,377.64/125,764.40
  6. Step 6: Final answer
    x = 100,073.10

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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.