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Finding the Fourth Proportional to 121,329.56, 167,447.34 and 72,947.32

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Solution

The fourth proportional to 121,329.56, 167,447.34 and 72,947.32 is: 100,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,329.56 : 167,447.34 = 72,947.32 : x
  2. Step 2: Convert to fraction form
    121,329.56/167,447.34 = 72,947.32/x
  3. Step 3: Cross multiply
    121,329.56x = 167,447.34 × 72,947.32
  4. Step 4: Simplify right side
    121,329.56x = 12,214,834,694.13
  5. Step 5: Solve for x
    x = 12,214,834,694.13/121,329.56
  6. Step 6: Final answer
    x = 100,674.85

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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.