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Finding the Fourth Proportional to 121,971.57, 168,326.01 and 75,414.66

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Solution

The fourth proportional to 121,971.57, 168,326.01 and 75,414.66 is: 104,075.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,971.57 : 168,326.01 = 75,414.66 : x
  2. Step 2: Convert to fraction form
    121,971.57/168,326.01 = 75,414.66/x
  3. Step 3: Cross multiply
    121,971.57x = 168,326.01 × 75,414.66
  4. Step 4: Simplify right side
    121,971.57x = 12,694,248,813.31
  5. Step 5: Solve for x
    x = 12,694,248,813.31/121,971.57
  6. Step 6: Final answer
    x = 104,075.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.