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Finding the Fourth Proportional to 172,988.81, 238,512.47 and 142,254.50

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Solution

The fourth proportional to 172,988.81, 238,512.47 and 142,254.50 is: 196,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,988.81 : 238,512.47 = 142,254.50 : x
  2. Step 2: Convert to fraction form
    172,988.81/238,512.47 = 142,254.50/x
  3. Step 3: Cross multiply
    172,988.81x = 238,512.47 × 142,254.50
  4. Step 4: Simplify right side
    172,988.81x = 33,929,472,163.62
  5. Step 5: Solve for x
    x = 33,929,472,163.62/172,988.81
  6. Step 6: Final answer
    x = 196,136.80

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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.