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Finding the Fourth Proportional to 171,309.90, 236,367.81 and 99,649.20

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Solution

The fourth proportional to 171,309.90, 236,367.81 and 99,649.20 is: 137,492.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,309.90 : 236,367.81 = 99,649.20 : x
  2. Step 2: Convert to fraction form
    171,309.90/236,367.81 = 99,649.20/x
  3. Step 3: Cross multiply
    171,309.90x = 236,367.81 × 99,649.20
  4. Step 4: Simplify right side
    171,309.90x = 23,553,863,172.25
  5. Step 5: Solve for x
    x = 23,553,863,172.25/171,309.90
  6. Step 6: Final answer
    x = 137,492.71

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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.