Home / 101,947.78-140,639.11-71,749.86

Finding the Fourth Proportional to 101,947.78, 140,639.11 and 71,749.86

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Solution

The fourth proportional to 101,947.78, 140,639.11 and 71,749.86 is: 98,980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,947.78 : 140,639.11 = 71,749.86 : x
  2. Step 2: Convert to fraction form
    101,947.78/140,639.11 = 71,749.86/x
  3. Step 3: Cross multiply
    101,947.78x = 140,639.11 × 71,749.86
  4. Step 4: Simplify right side
    101,947.78x = 10,090,836,453.02
  5. Step 5: Solve for x
    x = 10,090,836,453.02/101,947.78
  6. Step 6: Final answer
    x = 98,980.44

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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.