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Finding the Fourth Proportional to 72,977.56, 100,708.96 and 39,443.56

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Solution

The fourth proportional to 72,977.56, 100,708.96 and 39,443.56 is: 54,432.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,977.56 : 100,708.96 = 39,443.56 : x
  2. Step 2: Convert to fraction form
    72,977.56/100,708.96 = 39,443.56/x
  3. Step 3: Cross multiply
    72,977.56x = 100,708.96 × 39,443.56
  4. Step 4: Simplify right side
    72,977.56x = 3,972,319,906.30
  5. Step 5: Solve for x
    x = 3,972,319,906.30/72,977.56
  6. Step 6: Final answer
    x = 54,432.07

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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.