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Finding the Fourth Proportional to 91,329.78, 126,034.80 and 51,043.50

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Solution

The fourth proportional to 91,329.78, 126,034.80 and 51,043.50 is: 70,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,329.78 : 126,034.80 = 51,043.50 : x
  2. Step 2: Convert to fraction form
    91,329.78/126,034.80 = 51,043.50/x
  3. Step 3: Cross multiply
    91,329.78x = 126,034.80 × 51,043.50
  4. Step 4: Simplify right side
    91,329.78x = 6,433,257,313.80
  5. Step 5: Solve for x
    x = 6,433,257,313.80/91,329.78
  6. Step 6: Final answer
    x = 70,439.86

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1.5x scale

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.