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Finding the Fourth Proportional to 169,638.70, 254,458.05 and 86,694.70

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Solution

The fourth proportional to 169,638.70, 254,458.05 and 86,694.70 is: 130,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,638.70 : 254,458.05 = 86,694.70 : x
  2. Step 2: Convert to fraction form
    169,638.70/254,458.05 = 86,694.70/x
  3. Step 3: Cross multiply
    169,638.70x = 254,458.05 × 86,694.70
  4. Step 4: Simplify right side
    169,638.70x = 22,060,164,307.34
  5. Step 5: Solve for x
    x = 22,060,164,307.34/169,638.70
  6. Step 6: Final answer
    x = 130,042.05

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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.