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Finding the Fourth Proportional to 69,656.16, 104,425.92 and 28,074

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Solution

The fourth proportional to 69,656.16, 104,425.92 and 28,074 is: 42,087.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,656.16 : 104,425.92 = 28,074 : x
  2. Step 2: Convert to fraction form
    69,656.16/104,425.92 = 28,074/x
  3. Step 3: Cross multiply
    69,656.16x = 104,425.92 × 28,074
  4. Step 4: Simplify right side
    69,656.16x = 2,931,653,278.08
  5. Step 5: Solve for x
    x = 2,931,653,278.08/69,656.16
  6. Step 6: Final answer
    x = 42,087.49

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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.