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Finding the Fourth Proportional to 172,419.60, 258,629.40 and 125,763.60

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Solution

The fourth proportional to 172,419.60, 258,629.40 and 125,763.60 is: 188,645.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,419.60 : 258,629.40 = 125,763.60 : x
  2. Step 2: Convert to fraction form
    172,419.60/258,629.40 = 125,763.60/x
  3. Step 3: Cross multiply
    172,419.60x = 258,629.40 × 125,763.60
  4. Step 4: Simplify right side
    172,419.60x = 32,526,164,409.84
  5. Step 5: Solve for x
    x = 32,526,164,409.84/172,419.60
  6. Step 6: Final answer
    x = 188,645.40

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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.