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Finding the Fourth Proportional to 109,886.15, 151,666.45 and 66,879.50

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Solution

The fourth proportional to 109,886.15, 151,666.45 and 66,879.50 is: 92,308.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,886.15 : 151,666.45 = 66,879.50 : x
  2. Step 2: Convert to fraction form
    109,886.15/151,666.45 = 66,879.50/x
  3. Step 3: Cross multiply
    109,886.15x = 151,666.45 × 66,879.50
  4. Step 4: Simplify right side
    109,886.15x = 10,143,375,291.85
  5. Step 5: Solve for x
    x = 10,143,375,291.85/109,886.15
  6. Step 6: Final answer
    x = 92,308.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.