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Finding the Fourth Proportional to 120,812.53, 166,711.53 and 69,828.56

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Solution

The fourth proportional to 120,812.53, 166,711.53 and 69,828.56 is: 96,357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,812.53 : 166,711.53 = 69,828.56 : x
  2. Step 2: Convert to fraction form
    120,812.53/166,711.53 = 69,828.56/x
  3. Step 3: Cross multiply
    120,812.53x = 166,711.53 × 69,828.56
  4. Step 4: Simplify right side
    120,812.53x = 11,641,226,753.93
  5. Step 5: Solve for x
    x = 11,641,226,753.93/120,812.53
  6. Step 6: Final answer
    x = 96,357.78

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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.