Home / 117,302.38-161,748.88-87,143.65

Finding the Fourth Proportional to 117,302.38, 161,748.88 and 87,143.65

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Solution

The fourth proportional to 117,302.38, 161,748.88 and 87,143.65 is: 120,162.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,302.38 : 161,748.88 = 87,143.65 : x
  2. Step 2: Convert to fraction form
    117,302.38/161,748.88 = 87,143.65/x
  3. Step 3: Cross multiply
    117,302.38x = 161,748.88 × 87,143.65
  4. Step 4: Simplify right side
    117,302.38x = 14,095,387,786.61
  5. Step 5: Solve for x
    x = 14,095,387,786.61/117,302.38
  6. Step 6: Final answer
    x = 120,162.85

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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.