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Finding the Fourth Proportional to 171,388.44, 236,520 and 99,781.20

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Solution

The fourth proportional to 171,388.44, 236,520 and 99,781.20 is: 137,700.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,388.44 : 236,520 = 99,781.20 : x
  2. Step 2: Convert to fraction form
    171,388.44/236,520 = 99,781.20/x
  3. Step 3: Cross multiply
    171,388.44x = 236,520 × 99,781.20
  4. Step 4: Simplify right side
    171,388.44x = 23,600,249,424
  5. Step 5: Solve for x
    x = 23,600,249,424/171,388.44
  6. Step 6: Final answer
    x = 137,700.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.