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Finding the Fourth Proportional to 121,120.87, 181,718.16 and 61,998.04

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Solution

The fourth proportional to 121,120.87, 181,718.16 and 61,998.04 is: 93,015.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,120.87 : 181,718.16 = 61,998.04 : x
  2. Step 2: Convert to fraction form
    121,120.87/181,718.16 = 61,998.04/x
  3. Step 3: Cross multiply
    121,120.87x = 181,718.16 × 61,998.04
  4. Step 4: Simplify right side
    121,120.87x = 11,266,169,752.41
  5. Step 5: Solve for x
    x = 11,266,169,752.41/121,120.87
  6. Step 6: Final answer
    x = 93,015.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.