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Finding the Fourth Proportional to 72,369.45, 108,491.94 and 34,878.06

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Solution

The fourth proportional to 72,369.45, 108,491.94 and 34,878.06 is: 52,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,369.45 : 108,491.94 = 34,878.06 : x
  2. Step 2: Convert to fraction form
    72,369.45/108,491.94 = 34,878.06/x
  3. Step 3: Cross multiply
    72,369.45x = 108,491.94 × 34,878.06
  4. Step 4: Simplify right side
    72,369.45x = 3,783,988,392.84
  5. Step 5: Solve for x
    x = 3,783,988,392.84/72,369.45
  6. Step 6: Final answer
    x = 52,287.10

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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.