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Finding the Fourth Proportional to 91,295.12, 125,986.92 and 51,012.56

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Solution

The fourth proportional to 91,295.12, 125,986.92 and 51,012.56 is: 70,397.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,295.12 : 125,986.92 = 51,012.56 : x
  2. Step 2: Convert to fraction form
    91,295.12/125,986.92 = 51,012.56/x
  3. Step 3: Cross multiply
    91,295.12x = 125,986.92 × 51,012.56
  4. Step 4: Simplify right side
    91,295.12x = 6,426,915,315.72
  5. Step 5: Solve for x
    x = 6,426,915,315.72/91,295.12
  6. Step 6: Final answer
    x = 70,397.14

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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.