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Finding the Fourth Proportional to 239,103.86, 358,655.79 and 72,890.42

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Solution

The fourth proportional to 239,103.86, 358,655.79 and 72,890.42 is: 109,335.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,103.86 : 358,655.79 = 72,890.42 : x
  2. Step 2: Convert to fraction form
    239,103.86/358,655.79 = 72,890.42/x
  3. Step 3: Cross multiply
    239,103.86x = 358,655.79 × 72,890.42
  4. Step 4: Simplify right side
    239,103.86x = 26,142,571,168.53
  5. Step 5: Solve for x
    x = 26,142,571,168.53/239,103.86
  6. Step 6: Final answer
    x = 109,335.63

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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.