Home / 121,405.06-167,565.82-78,889.78

Finding the Fourth Proportional to 121,405.06, 167,565.82 and 78,889.78

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Solution

The fourth proportional to 121,405.06, 167,565.82 and 78,889.78 is: 108,885.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,405.06 : 167,565.82 = 78,889.78 : x
  2. Step 2: Convert to fraction form
    121,405.06/167,565.82 = 78,889.78/x
  3. Step 3: Cross multiply
    121,405.06x = 167,565.82 × 78,889.78
  4. Step 4: Simplify right side
    121,405.06x = 13,219,230,675.32
  5. Step 5: Solve for x
    x = 13,219,230,675.32/121,405.06
  6. Step 6: Final answer
    x = 108,885.34

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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.