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Finding the Fourth Proportional to 120,879.80, 166,766.35 and 69,883.15

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Solution

The fourth proportional to 120,879.80, 166,766.35 and 69,883.15 is: 96,411.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,879.80 : 166,766.35 = 69,883.15 : x
  2. Step 2: Convert to fraction form
    120,879.80/166,766.35 = 69,883.15/x
  3. Step 3: Cross multiply
    120,879.80x = 166,766.35 × 69,883.15
  4. Step 4: Simplify right side
    120,879.80x = 11,654,157,852.00
  5. Step 5: Solve for x
    x = 11,654,157,852.00/120,879.80
  6. Step 6: Final answer
    x = 96,411.13

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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.