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Finding the Fourth Proportional to 169,731.51, 254,209.65 and 81,047.44

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Solution

The fourth proportional to 169,731.51, 254,209.65 and 81,047.44 is: 121,386.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,731.51 : 254,209.65 = 81,047.44 : x
  2. Step 2: Convert to fraction form
    169,731.51/254,209.65 = 81,047.44/x
  3. Step 3: Cross multiply
    169,731.51x = 254,209.65 × 81,047.44
  4. Step 4: Simplify right side
    169,731.51x = 20,603,041,355.80
  5. Step 5: Solve for x
    x = 20,603,041,355.80/169,731.51
  6. Step 6: Final answer
    x = 121,386.07

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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.