Home / 71,790.40-108,164.16-66,122.56

Finding the Fourth Proportional to 71,790.40, 108,164.16 and 66,122.56

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Solution

The fourth proportional to 71,790.40, 108,164.16 and 66,122.56 is: 99,624.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,790.40 : 108,164.16 = 66,122.56 : x
  2. Step 2: Convert to fraction form
    71,790.40/108,164.16 = 66,122.56/x
  3. Step 3: Cross multiply
    71,790.40x = 108,164.16 × 66,122.56
  4. Step 4: Simplify right side
    71,790.40x = 7,152,091,159.45
  5. Step 5: Solve for x
    x = 7,152,091,159.45/71,790.40
  6. Step 6: Final answer
    x = 99,624.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.