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Finding the Fourth Proportional to 91,970.72, 126,922.93 and 51,685.28

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Solution

The fourth proportional to 91,970.72, 126,922.93 and 51,685.28 is: 71,327.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,970.72 : 126,922.93 = 51,685.28 : x
  2. Step 2: Convert to fraction form
    91,970.72/126,922.93 = 51,685.28/x
  3. Step 3: Cross multiply
    91,970.72x = 126,922.93 × 51,685.28
  4. Step 4: Simplify right side
    91,970.72x = 6,560,046,411.64
  5. Step 5: Solve for x
    x = 6,560,046,411.64/91,970.72
  6. Step 6: Final answer
    x = 71,327.56

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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.