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Finding the Fourth Proportional to 125,778.30, 188,886.15 and 66,729.30

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Solution

The fourth proportional to 125,778.30, 188,886.15 and 66,729.30 is: 100,209.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,778.30 : 188,886.15 = 66,729.30 : x
  2. Step 2: Convert to fraction form
    125,778.30/188,886.15 = 66,729.30/x
  3. Step 3: Cross multiply
    125,778.30x = 188,886.15 × 66,729.30
  4. Step 4: Simplify right side
    125,778.30x = 12,604,240,569.20
  5. Step 5: Solve for x
    x = 12,604,240,569.20/125,778.30
  6. Step 6: Final answer
    x = 100,209.98

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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.