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Finding the Fourth Proportional to 135,368, 186,781.92 and 87,614.72

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Solution

The fourth proportional to 135,368, 186,781.92 and 87,614.72 is: 120,891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,368 : 186,781.92 = 87,614.72 : x
  2. Step 2: Convert to fraction form
    135,368/186,781.92 = 87,614.72/x
  3. Step 3: Cross multiply
    135,368x = 186,781.92 × 87,614.72
  4. Step 4: Simplify right side
    135,368x = 16,364,845,621.86
  5. Step 5: Solve for x
    x = 16,364,845,621.86/135,368
  6. Step 6: Final answer
    x = 120,891.54

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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.