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Finding the Fourth Proportional to 165,015.60, 247,465.80 and 86,103.60

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Solution

The fourth proportional to 165,015.60, 247,465.80 and 86,103.60 is: 129,125.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,015.60 : 247,465.80 = 86,103.60 : x
  2. Step 2: Convert to fraction form
    165,015.60/247,465.80 = 86,103.60/x
  3. Step 3: Cross multiply
    165,015.60x = 247,465.80 × 86,103.60
  4. Step 4: Simplify right side
    165,015.60x = 21,307,696,256.88
  5. Step 5: Solve for x
    x = 21,307,696,256.88/165,015.60
  6. Step 6: Final answer
    x = 129,125.34

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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.