Home / 78,939.96-108,935.86-43,129.20

Finding the Fourth Proportional to 78,939.96, 108,935.86 and 43,129.20

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Solution

The fourth proportional to 78,939.96, 108,935.86 and 43,129.20 is: 59,517.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.96 : 108,935.86 = 43,129.20 : x
  2. Step 2: Convert to fraction form
    78,939.96/108,935.86 = 43,129.20/x
  3. Step 3: Cross multiply
    78,939.96x = 108,935.86 × 43,129.20
  4. Step 4: Simplify right side
    78,939.96x = 4,698,316,385.29
  5. Step 5: Solve for x
    x = 4,698,316,385.29/78,939.96
  6. Step 6: Final answer
    x = 59,517.59

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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.