Home / 129,434.44-178,674.63-87,017.57

Finding the Fourth Proportional to 129,434.44, 178,674.63 and 87,017.57

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Solution

The fourth proportional to 129,434.44, 178,674.63 and 87,017.57 is: 120,121.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,434.44 : 178,674.63 = 87,017.57 : x
  2. Step 2: Convert to fraction form
    129,434.44/178,674.63 = 87,017.57/x
  3. Step 3: Cross multiply
    129,434.44x = 178,674.63 × 87,017.57
  4. Step 4: Simplify right side
    129,434.44x = 15,547,832,123.25
  5. Step 5: Solve for x
    x = 15,547,832,123.25/129,434.44
  6. Step 6: Final answer
    x = 120,121.29

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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.