Home / 121,947.96-168,255.16-83,719.20

Finding the Fourth Proportional to 121,947.96, 168,255.16 and 83,719.20

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Solution

The fourth proportional to 121,947.96, 168,255.16 and 83,719.20 is: 115,509.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,947.96 : 168,255.16 = 83,719.20 : x
  2. Step 2: Convert to fraction form
    121,947.96/168,255.16 = 83,719.20/x
  3. Step 3: Cross multiply
    121,947.96x = 168,255.16 × 83,719.20
  4. Step 4: Simplify right side
    121,947.96x = 14,086,187,391.07
  5. Step 5: Solve for x
    x = 14,086,187,391.07/121,947.96
  6. Step 6: Final answer
    x = 115,509.82

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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.