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Finding the Fourth Proportional to 121,451.50, 167,625.75 and 71,150.50

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Solution

The fourth proportional to 121,451.50, 167,625.75 and 71,150.50 is: 98,200.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,451.50 : 167,625.75 = 71,150.50 : x
  2. Step 2: Convert to fraction form
    121,451.50/167,625.75 = 71,150.50/x
  3. Step 3: Cross multiply
    121,451.50x = 167,625.75 × 71,150.50
  4. Step 4: Simplify right side
    121,451.50x = 11,926,655,925.38
  5. Step 5: Solve for x
    x = 11,926,655,925.38/121,451.50
  6. Step 6: Final answer
    x = 98,200.98

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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.