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Finding the Fourth Proportional to 70,209.76, 96,878.17 and 39,995.68

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Solution

The fourth proportional to 70,209.76, 96,878.17 and 39,995.68 is: 55,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,209.76 : 96,878.17 = 39,995.68 : x
  2. Step 2: Convert to fraction form
    70,209.76/96,878.17 = 39,995.68/x
  3. Step 3: Cross multiply
    70,209.76x = 96,878.17 × 39,995.68
  4. Step 4: Simplify right side
    70,209.76x = 3,874,708,286.31
  5. Step 5: Solve for x
    x = 3,874,708,286.31/70,209.76
  6. Step 6: Final answer
    x = 55,187.60

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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.