Home / 78,923.18-108,921.49-43,118.57

Finding the Fourth Proportional to 78,923.18, 108,921.49 and 43,118.57

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Solution

The fourth proportional to 78,923.18, 108,921.49 and 43,118.57 is: 59,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,923.18 : 108,921.49 = 43,118.57 : x
  2. Step 2: Convert to fraction form
    78,923.18/108,921.49 = 43,118.57/x
  3. Step 3: Cross multiply
    78,923.18x = 108,921.49 × 43,118.57
  4. Step 4: Simplify right side
    78,923.18x = 4,696,538,891.07
  5. Step 5: Solve for x
    x = 4,696,538,891.07/78,923.18
  6. Step 6: Final answer
    x = 59,507.72

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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.