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Finding the Fourth Proportional to 169,712.60, 254,641.80 and 86,606.60

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Solution

The fourth proportional to 169,712.60, 254,641.80 and 86,606.60 is: 129,947.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,712.60 : 254,641.80 = 86,606.60 : x
  2. Step 2: Convert to fraction form
    169,712.60/254,641.80 = 86,606.60/x
  3. Step 3: Cross multiply
    169,712.60x = 254,641.80 × 86,606.60
  4. Step 4: Simplify right side
    169,712.60x = 22,053,660,515.88
  5. Step 5: Solve for x
    x = 22,053,660,515.88/169,712.60
  6. Step 6: Final answer
    x = 129,947.10

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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.