Home / 102,968.28-142,178.90-82,760.40

Finding the Fourth Proportional to 102,968.28, 142,178.90 and 82,760.40

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Solution

The fourth proportional to 102,968.28, 142,178.90 and 82,760.40 is: 114,275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,968.28 : 142,178.90 = 82,760.40 : x
  2. Step 2: Convert to fraction form
    102,968.28/142,178.90 = 82,760.40/x
  3. Step 3: Cross multiply
    102,968.28x = 142,178.90 × 82,760.40
  4. Step 4: Simplify right side
    102,968.28x = 11,766,782,221.76
  5. Step 5: Solve for x
    x = 11,766,782,221.76/102,968.28
  6. Step 6: Final answer
    x = 114,275.80

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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.