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Finding the Fourth Proportional to 67,913.72, 101,871.28 and 20,529.20

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Solution

The fourth proportional to 67,913.72, 101,871.28 and 20,529.20 is: 30,794.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,913.72 : 101,871.28 = 20,529.20 : x
  2. Step 2: Convert to fraction form
    67,913.72/101,871.28 = 20,529.20/x
  3. Step 3: Cross multiply
    67,913.72x = 101,871.28 × 20,529.20
  4. Step 4: Simplify right side
    67,913.72x = 2,091,335,881.38
  5. Step 5: Solve for x
    x = 2,091,335,881.38/67,913.72
  6. Step 6: Final answer
    x = 30,794.01

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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.