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Finding the Fourth Proportional to 91,871.70, 126,775.17 and 51,582.30

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Solution

The fourth proportional to 91,871.70, 126,775.17 and 51,582.30 is: 71,179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,871.70 : 126,775.17 = 51,582.30 : x
  2. Step 2: Convert to fraction form
    91,871.70/126,775.17 = 51,582.30/x
  3. Step 3: Cross multiply
    91,871.70x = 126,775.17 × 51,582.30
  4. Step 4: Simplify right side
    91,871.70x = 6,539,354,851.49
  5. Step 5: Solve for x
    x = 6,539,354,851.49/91,871.70
  6. Step 6: Final answer
    x = 71,179.21

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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.