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Finding the Fourth Proportional to 239,120.72, 358,679.64 and 72,908.72

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Solution

The fourth proportional to 239,120.72, 358,679.64 and 72,908.72 is: 109,362.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,120.72 : 358,679.64 = 72,908.72 : x
  2. Step 2: Convert to fraction form
    239,120.72/358,679.64 = 72,908.72/x
  3. Step 3: Cross multiply
    239,120.72x = 358,679.64 × 72,908.72
  4. Step 4: Simplify right side
    239,120.72x = 26,150,873,442.46
  5. Step 5: Solve for x
    x = 26,150,873,442.46/239,120.72
  6. Step 6: Final answer
    x = 109,362.64

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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.