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Finding the Fourth Proportional to 67,073.94, 100,599.75 and 20,315.70

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Solution

The fourth proportional to 67,073.94, 100,599.75 and 20,315.70 is: 30,470.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,073.94 : 100,599.75 = 20,315.70 : x
  2. Step 2: Convert to fraction form
    67,073.94/100,599.75 = 20,315.70/x
  3. Step 3: Cross multiply
    67,073.94x = 100,599.75 × 20,315.70
  4. Step 4: Simplify right side
    67,073.94x = 2,043,754,341.08
  5. Step 5: Solve for x
    x = 2,043,754,341.08/67,073.94
  6. Step 6: Final answer
    x = 30,470.17

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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.