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Finding the Fourth Proportional to 91,866.85, 126,744.24 and 57,878.37

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Solution

The fourth proportional to 91,866.85, 126,744.24 and 57,878.37 is: 79,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,866.85 : 126,744.24 = 57,878.37 : x
  2. Step 2: Convert to fraction form
    91,866.85/126,744.24 = 57,878.37/x
  3. Step 3: Cross multiply
    91,866.85x = 126,744.24 × 57,878.37
  4. Step 4: Simplify right side
    91,866.85x = 7,335,750,018.09
  5. Step 5: Solve for x
    x = 7,335,750,018.09/91,866.85
  6. Step 6: Final answer
    x = 79,851.98

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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.