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Finding the Fourth Proportional to 169,963.10, 255,017.55 and 86,857.10

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Solution

The fourth proportional to 169,963.10, 255,017.55 and 86,857.10 is: 130,322.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,963.10 : 255,017.55 = 86,857.10 : x
  2. Step 2: Convert to fraction form
    169,963.10/255,017.55 = 86,857.10/x
  3. Step 3: Cross multiply
    169,963.10x = 255,017.55 × 86,857.10
  4. Step 4: Simplify right side
    169,963.10x = 22,150,084,842.11
  5. Step 5: Solve for x
    x = 22,150,084,842.11/169,963.10
  6. Step 6: Final answer
    x = 130,322.90

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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.