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Finding the Fourth Proportional to 121,277.80, 167,273.94 and 80,972.20

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Solution

The fourth proportional to 121,277.80, 167,273.94 and 80,972.20 is: 111,681.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,277.80 : 167,273.94 = 80,972.20 : x
  2. Step 2: Convert to fraction form
    121,277.80/167,273.94 = 80,972.20/x
  3. Step 3: Cross multiply
    121,277.80x = 167,273.94 × 80,972.20
  4. Step 4: Simplify right side
    121,277.80x = 13,544,538,924.47
  5. Step 5: Solve for x
    x = 13,544,538,924.47/121,277.80
  6. Step 6: Final answer
    x = 111,681.93

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1.5x scale

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.