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Finding the Fourth Proportional to 72,972.24, 100,701.72 and 39,438.24

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Solution

The fourth proportional to 72,972.24, 100,701.72 and 39,438.24 is: 54,424.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,972.24 : 100,701.72 = 39,438.24 : x
  2. Step 2: Convert to fraction form
    72,972.24/100,701.72 = 39,438.24/x
  3. Step 3: Cross multiply
    72,972.24x = 100,701.72 × 39,438.24
  4. Step 4: Simplify right side
    72,972.24x = 3,971,498,601.77
  5. Step 5: Solve for x
    x = 3,971,498,601.77/72,972.24
  6. Step 6: Final answer
    x = 54,424.79

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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.