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Finding the Fourth Proportional to 100,958.44, 139,317.66 and 58,530.76

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Solution

The fourth proportional to 100,958.44, 139,317.66 and 58,530.76 is: 80,769.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,958.44 : 139,317.66 = 58,530.76 : x
  2. Step 2: Convert to fraction form
    100,958.44/139,317.66 = 58,530.76/x
  3. Step 3: Cross multiply
    100,958.44x = 139,317.66 × 58,530.76
  4. Step 4: Simplify right side
    100,958.44x = 8,154,368,521.22
  5. Step 5: Solve for x
    x = 8,154,368,521.22/100,958.44
  6. Step 6: Final answer
    x = 80,769.56

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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.