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Finding the Fourth Proportional to 67,807.20, 101,709.20 and 18,559.20

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Solution

The fourth proportional to 67,807.20, 101,709.20 and 18,559.20 is: 27,838.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,807.20 : 101,709.20 = 18,559.20 : x
  2. Step 2: Convert to fraction form
    67,807.20/101,709.20 = 18,559.20/x
  3. Step 3: Cross multiply
    67,807.20x = 101,709.20 × 18,559.20
  4. Step 4: Simplify right side
    67,807.20x = 1,887,641,384.64
  5. Step 5: Solve for x
    x = 1,887,641,384.64/67,807.20
  6. Step 6: Final answer
    x = 27,838.36

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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.