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Finding the Fourth Proportional to 67,709.80, 101,574.16 and 28,257.88

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Solution

The fourth proportional to 67,709.80, 101,574.16 and 28,257.88 is: 42,390.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,709.80 : 101,574.16 = 28,257.88 : x
  2. Step 2: Convert to fraction form
    67,709.80/101,574.16 = 28,257.88/x
  3. Step 3: Cross multiply
    67,709.80x = 101,574.16 × 28,257.88
  4. Step 4: Simplify right side
    67,709.80x = 2,870,270,424.38
  5. Step 5: Solve for x
    x = 2,870,270,424.38/67,709.80
  6. Step 6: Final answer
    x = 42,390.77

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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.