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Finding the Fourth Proportional to 71,235.32, 98,305.79 and 39,404.07

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Solution

The fourth proportional to 71,235.32, 98,305.79 and 39,404.07 is: 54,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,235.32 : 98,305.79 = 39,404.07 : x
  2. Step 2: Convert to fraction form
    71,235.32/98,305.79 = 39,404.07/x
  3. Step 3: Cross multiply
    71,235.32x = 98,305.79 × 39,404.07
  4. Step 4: Simplify right side
    71,235.32x = 3,873,648,033.54
  5. Step 5: Solve for x
    x = 3,873,648,033.54/71,235.32
  6. Step 6: Final answer
    x = 54,378.20

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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.