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Finding the Fourth Proportional to 91,673.70, 126,518.67 and 51,387.54

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Solution

The fourth proportional to 91,673.70, 126,518.67 and 51,387.54 is: 70,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,673.70 : 126,518.67 = 51,387.54 : x
  2. Step 2: Convert to fraction form
    91,673.70/126,518.67 = 51,387.54/x
  3. Step 3: Cross multiply
    91,673.70x = 126,518.67 × 51,387.54
  4. Step 4: Simplify right side
    91,673.70x = 6,501,483,215.37
  5. Step 5: Solve for x
    x = 6,501,483,215.37/91,673.70
  6. Step 6: Final answer
    x = 70,919.83

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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.