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Finding the Fourth Proportional to 120,879.63, 166,744.40 and 75,478.79

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Solution

The fourth proportional to 120,879.63, 166,744.40 and 75,478.79 is: 104,117.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,879.63 : 166,744.40 = 75,478.79 : x
  2. Step 2: Convert to fraction form
    120,879.63/166,744.40 = 75,478.79/x
  3. Step 3: Cross multiply
    120,879.63x = 166,744.40 × 75,478.79
  4. Step 4: Simplify right side
    120,879.63x = 12,585,665,590.74
  5. Step 5: Solve for x
    x = 12,585,665,590.74/120,879.63
  6. Step 6: Final answer
    x = 104,117.34

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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.