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Finding the Fourth Proportional to 169,637.20, 254,455.80 and 143,393.20

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Solution

The fourth proportional to 169,637.20, 254,455.80 and 143,393.20 is: 215,089.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,637.20 : 254,455.80 = 143,393.20 : x
  2. Step 2: Convert to fraction form
    169,637.20/254,455.80 = 143,393.20/x
  3. Step 3: Cross multiply
    169,637.20x = 254,455.80 × 143,393.20
  4. Step 4: Simplify right side
    169,637.20x = 36,487,231,420.56
  5. Step 5: Solve for x
    x = 36,487,231,420.56/169,637.20
  6. Step 6: Final answer
    x = 215,089.80

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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.