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Finding the Fourth Proportional to 120,612.89, 166,336.85 and 75,295.07

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Solution

The fourth proportional to 120,612.89, 166,336.85 and 75,295.07 is: 103,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,612.89 : 166,336.85 = 75,295.07 : x
  2. Step 2: Convert to fraction form
    120,612.89/166,336.85 = 75,295.07/x
  3. Step 3: Cross multiply
    120,612.89x = 166,336.85 × 75,295.07
  4. Step 4: Simplify right side
    120,612.89x = 12,524,345,368.41
  5. Step 5: Solve for x
    x = 12,524,345,368.41/120,612.89
  6. Step 6: Final answer
    x = 103,839.20

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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.