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Finding the Fourth Proportional to 100,795.56, 139,114.92 and 58,379.88

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Solution

The fourth proportional to 100,795.56, 139,114.92 and 58,379.88 is: 80,574.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,795.56 : 139,114.92 = 58,379.88 : x
  2. Step 2: Convert to fraction form
    100,795.56/139,114.92 = 58,379.88/x
  3. Step 3: Cross multiply
    100,795.56x = 139,114.92 × 58,379.88
  4. Step 4: Simplify right side
    100,795.56x = 8,121,512,335.81
  5. Step 5: Solve for x
    x = 8,121,512,335.81/100,795.56
  6. Step 6: Final answer
    x = 80,574.11

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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.