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Finding the Fourth Proportional to 126,081.40, 188,891.70 and 102,580.60

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Solution

The fourth proportional to 126,081.40, 188,891.70 and 102,580.60 is: 153,683.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,081.40 : 188,891.70 = 102,580.60 : x
  2. Step 2: Convert to fraction form
    126,081.40/188,891.70 = 102,580.60/x
  3. Step 3: Cross multiply
    126,081.40x = 188,891.70 × 102,580.60
  4. Step 4: Simplify right side
    126,081.40x = 19,376,623,921.02
  5. Step 5: Solve for x
    x = 19,376,623,921.02/126,081.40
  6. Step 6: Final answer
    x = 153,683.45

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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.