Home / 78,722.60-108,634.50-42,912.04

Finding the Fourth Proportional to 78,722.60, 108,634.50 and 42,912.04

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Solution

The fourth proportional to 78,722.60, 108,634.50 and 42,912.04 is: 59,217.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722.60 : 108,634.50 = 42,912.04 : x
  2. Step 2: Convert to fraction form
    78,722.60/108,634.50 = 42,912.04/x
  3. Step 3: Cross multiply
    78,722.60x = 108,634.50 × 42,912.04
  4. Step 4: Simplify right side
    78,722.60x = 4,661,728,009.38
  5. Step 5: Solve for x
    x = 4,661,728,009.38/78,722.60
  6. Step 6: Final answer
    x = 59,217.15

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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.