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Finding the Fourth Proportional to 65,425.45, 98,138.17 and 21,055.66

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Solution

The fourth proportional to 65,425.45, 98,138.17 and 21,055.66 is: 31,583.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,425.45 : 98,138.17 = 21,055.66 : x
  2. Step 2: Convert to fraction form
    65,425.45/98,138.17 = 21,055.66/x
  3. Step 3: Cross multiply
    65,425.45x = 98,138.17 × 21,055.66
  4. Step 4: Simplify right side
    65,425.45x = 2,066,363,940.54
  5. Step 5: Solve for x
    x = 2,066,363,940.54/65,425.45
  6. Step 6: Final answer
    x = 31,583.49

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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.