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Finding the Fourth Proportional to 100,751.28, 139,034.52 and 58,308.96

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Solution

The fourth proportional to 100,751.28, 139,034.52 and 58,308.96 is: 80,465.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.28 : 139,034.52 = 58,308.96 : x
  2. Step 2: Convert to fraction form
    100,751.28/139,034.52 = 58,308.96/x
  3. Step 3: Cross multiply
    100,751.28x = 139,034.52 × 58,308.96
  4. Step 4: Simplify right side
    100,751.28x = 8,106,958,265.30
  5. Step 5: Solve for x
    x = 8,106,958,265.30/100,751.28
  6. Step 6: Final answer
    x = 80,465.06

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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.