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Finding the Fourth Proportional to 67,225.88, 100,838.82 and 20,478.75

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Solution

The fourth proportional to 67,225.88, 100,838.82 and 20,478.75 is: 30,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,225.88 : 100,838.82 = 20,478.75 : x
  2. Step 2: Convert to fraction form
    67,225.88/100,838.82 = 20,478.75/x
  3. Step 3: Cross multiply
    67,225.88x = 100,838.82 × 20,478.75
  4. Step 4: Simplify right side
    67,225.88x = 2,065,052,985.08
  5. Step 5: Solve for x
    x = 2,065,052,985.08/67,225.88
  6. Step 6: Final answer
    x = 30,718.13

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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.