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Finding the Fourth Proportional to 67,215.71, 100,885.80 and 33,959.18

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Solution

The fourth proportional to 67,215.71, 100,885.80 and 33,959.18 is: 50,970.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,215.71 : 100,885.80 = 33,959.18 : x
  2. Step 2: Convert to fraction form
    67,215.71/100,885.80 = 33,959.18/x
  3. Step 3: Cross multiply
    67,215.71x = 100,885.80 × 33,959.18
  4. Step 4: Simplify right side
    67,215.71x = 3,425,999,041.64
  5. Step 5: Solve for x
    x = 3,425,999,041.64/67,215.71
  6. Step 6: Final answer
    x = 50,970.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.