Home / 129,587.05-178,769.01-75,838.78

Finding the Fourth Proportional to 129,587.05, 178,769.01 and 75,838.78

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Solution

The fourth proportional to 129,587.05, 178,769.01 and 75,838.78 is: 104,621.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,587.05 : 178,769.01 = 75,838.78 : x
  2. Step 2: Convert to fraction form
    129,587.05/178,769.01 = 75,838.78/x
  3. Step 3: Cross multiply
    129,587.05x = 178,769.01 × 75,838.78
  4. Step 4: Simplify right side
    129,587.05x = 13,557,623,620.21
  5. Step 5: Solve for x
    x = 13,557,623,620.21/129,587.05
  6. Step 6: Final answer
    x = 104,621.75

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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.