Home / 135,547.08-187,142.72-87,170.78

Finding the Fourth Proportional to 135,547.08, 187,142.72 and 87,170.78

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Solution

The fourth proportional to 135,547.08, 187,142.72 and 87,170.78 is: 120,352.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,547.08 : 187,142.72 = 87,170.78 : x
  2. Step 2: Convert to fraction form
    135,547.08/187,142.72 = 87,170.78/x
  3. Step 3: Cross multiply
    135,547.08x = 187,142.72 × 87,170.78
  4. Step 4: Simplify right side
    135,547.08x = 16,313,375,502.15
  5. Step 5: Solve for x
    x = 16,313,375,502.15/135,547.08
  6. Step 6: Final answer
    x = 120,352.10

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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.