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Finding the Fourth Proportional to 90,479.76, 135,764.91 and 40,595.51

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Solution

The fourth proportional to 90,479.76, 135,764.91 and 40,595.51 is: 60,913.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,479.76 : 135,764.91 = 40,595.51 : x
  2. Step 2: Convert to fraction form
    90,479.76/135,764.91 = 40,595.51/x
  3. Step 3: Cross multiply
    90,479.76x = 135,764.91 × 40,595.51
  4. Step 4: Simplify right side
    90,479.76x = 5,511,445,082.73
  5. Step 5: Solve for x
    x = 5,511,445,082.73/90,479.76
  6. Step 6: Final answer
    x = 60,913.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.