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Finding the Fourth Proportional to 169,991.10, 254,986.65 and 76,679.10

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Solution

The fourth proportional to 169,991.10, 254,986.65 and 76,679.10 is: 115,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,991.10 : 254,986.65 = 76,679.10 : x
  2. Step 2: Convert to fraction form
    169,991.10/254,986.65 = 76,679.10/x
  3. Step 3: Cross multiply
    169,991.10x = 254,986.65 × 76,679.10
  4. Step 4: Simplify right side
    169,991.10x = 19,552,146,834.02
  5. Step 5: Solve for x
    x = 19,552,146,834.02/169,991.10
  6. Step 6: Final answer
    x = 115,018.65

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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.