Home / 91,123.72-125,668.98-57,135.92

Finding the Fourth Proportional to 91,123.72, 125,668.98 and 57,135.92

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Solution

The fourth proportional to 91,123.72, 125,668.98 and 57,135.92 is: 78,796.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,123.72 : 125,668.98 = 57,135.92 : x
  2. Step 2: Convert to fraction form
    91,123.72/125,668.98 = 57,135.92/x
  3. Step 3: Cross multiply
    91,123.72x = 125,668.98 × 57,135.92
  4. Step 4: Simplify right side
    91,123.72x = 7,180,212,787.76
  5. Step 5: Solve for x
    x = 7,180,212,787.76/91,123.72
  6. Step 6: Final answer
    x = 78,796.31

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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.