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Finding the Fourth Proportional to 126,010.40, 188,894.10 and 72,647.60

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Solution

The fourth proportional to 126,010.40, 188,894.10 and 72,647.60 is: 108,901.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,010.40 : 188,894.10 = 72,647.60 : x
  2. Step 2: Convert to fraction form
    126,010.40/188,894.10 = 72,647.60/x
  3. Step 3: Cross multiply
    126,010.40x = 188,894.10 × 72,647.60
  4. Step 4: Simplify right side
    126,010.40x = 13,722,703,019.16
  5. Step 5: Solve for x
    x = 13,722,703,019.16/126,010.40
  6. Step 6: Final answer
    x = 108,901.35

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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.