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Finding the Fourth Proportional to 122,958.15, 169,689.48 and 75,220.65

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Solution

The fourth proportional to 122,958.15, 169,689.48 and 75,220.65 is: 103,808.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,958.15 : 169,689.48 = 75,220.65 : x
  2. Step 2: Convert to fraction form
    122,958.15/169,689.48 = 75,220.65/x
  3. Step 3: Cross multiply
    122,958.15x = 169,689.48 × 75,220.65
  4. Step 4: Simplify right side
    122,958.15x = 12,764,153,124.80
  5. Step 5: Solve for x
    x = 12,764,153,124.80/122,958.15
  6. Step 6: Final answer
    x = 103,808.92

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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.