Home / 100,945.12-139,308.96-58,516.96

Finding the Fourth Proportional to 100,945.12, 139,308.96 and 58,516.96

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Solution

The fourth proportional to 100,945.12, 139,308.96 and 58,516.96 is: 80,756.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,945.12 : 139,308.96 = 58,516.96 : x
  2. Step 2: Convert to fraction form
    100,945.12/139,308.96 = 58,516.96/x
  3. Step 3: Cross multiply
    100,945.12x = 139,308.96 × 58,516.96
  4. Step 4: Simplify right side
    100,945.12x = 8,151,936,839.96
  5. Step 5: Solve for x
    x = 8,151,936,839.96/100,945.12
  6. Step 6: Final answer
    x = 80,756.13

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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.