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Finding the Fourth Proportional to 67,219.91, 100,862.49 and 42,271.70

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Solution

The fourth proportional to 67,219.91, 100,862.49 and 42,271.70 is: 63,428.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,219.91 : 100,862.49 = 42,271.70 : x
  2. Step 2: Convert to fraction form
    67,219.91/100,862.49 = 42,271.70/x
  3. Step 3: Cross multiply
    67,219.91x = 100,862.49 × 42,271.70
  4. Step 4: Simplify right side
    67,219.91x = 4,263,628,918.53
  5. Step 5: Solve for x
    x = 4,263,628,918.53/67,219.91
  6. Step 6: Final answer
    x = 63,428.07

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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.