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Finding the Fourth Proportional to 169,991.60, 254,987.40 and 76,679.60

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Solution

The fourth proportional to 169,991.60, 254,987.40 and 76,679.60 is: 115,019.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,991.60 : 254,987.40 = 76,679.60 : x
  2. Step 2: Convert to fraction form
    169,991.60/254,987.40 = 76,679.60/x
  3. Step 3: Cross multiply
    169,991.60x = 254,987.40 × 76,679.60
  4. Step 4: Simplify right side
    169,991.60x = 19,552,331,837.04
  5. Step 5: Solve for x
    x = 19,552,331,837.04/169,991.60
  6. Step 6: Final answer
    x = 115,019.40

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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.