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Finding the Fourth Proportional to 67,561.58, 101,356.86 and 20,180.40

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Solution

The fourth proportional to 67,561.58, 101,356.86 and 20,180.40 is: 30,274.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,561.58 : 101,356.86 = 20,180.40 : x
  2. Step 2: Convert to fraction form
    67,561.58/101,356.86 = 20,180.40/x
  3. Step 3: Cross multiply
    67,561.58x = 101,356.86 × 20,180.40
  4. Step 4: Simplify right side
    67,561.58x = 2,045,421,977.54
  5. Step 5: Solve for x
    x = 2,045,421,977.54/67,561.58
  6. Step 6: Final answer
    x = 30,274.93

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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.