Home / 121,780.96-167,962.62-78,177.76

Finding the Fourth Proportional to 121,780.96, 167,962.62 and 78,177.76

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Solution

The fourth proportional to 121,780.96, 167,962.62 and 78,177.76 is: 107,824.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,780.96 : 167,962.62 = 78,177.76 : x
  2. Step 2: Convert to fraction form
    121,780.96/167,962.62 = 78,177.76/x
  3. Step 3: Cross multiply
    121,780.96x = 167,962.62 × 78,177.76
  4. Step 4: Simplify right side
    121,780.96x = 13,130,941,395.33
  5. Step 5: Solve for x
    x = 13,130,941,395.33/121,780.96
  6. Step 6: Final answer
    x = 107,824.26

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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.