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Finding the Fourth Proportional to 139,463.62, 209,029.38 and 72,885.94

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Solution

The fourth proportional to 139,463.62, 209,029.38 and 72,885.94 is: 109,242.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,463.62 : 209,029.38 = 72,885.94 : x
  2. Step 2: Convert to fraction form
    139,463.62/209,029.38 = 72,885.94/x
  3. Step 3: Cross multiply
    139,463.62x = 209,029.38 × 72,885.94
  4. Step 4: Simplify right side
    139,463.62x = 15,235,302,848.92
  5. Step 5: Solve for x
    x = 15,235,302,848.92/139,463.62
  6. Step 6: Final answer
    x = 109,242.13

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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.