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Finding the Fourth Proportional to 145,218.22, 217,866.21 and 131,338.06

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Solution

The fourth proportional to 145,218.22, 217,866.21 and 131,338.06 is: 197,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,218.22 : 217,866.21 = 131,338.06 : x
  2. Step 2: Convert to fraction form
    145,218.22/217,866.21 = 131,338.06/x
  3. Step 3: Cross multiply
    145,218.22x = 217,866.21 × 131,338.06
  4. Step 4: Simplify right side
    145,218.22x = 28,614,125,360.95
  5. Step 5: Solve for x
    x = 28,614,125,360.95/145,218.22
  6. Step 6: Final answer
    x = 197,042.25

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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.