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Finding the Fourth Proportional to 72,878.63, 109,071.02 and 44,816.45

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Solution

The fourth proportional to 72,878.63, 109,071.02 and 44,816.45 is: 67,072.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,878.63 : 109,071.02 = 44,816.45 : x
  2. Step 2: Convert to fraction form
    72,878.63/109,071.02 = 44,816.45/x
  3. Step 3: Cross multiply
    72,878.63x = 109,071.02 × 44,816.45
  4. Step 4: Simplify right side
    72,878.63x = 4,888,175,480.97
  5. Step 5: Solve for x
    x = 4,888,175,480.97/72,878.63
  6. Step 6: Final answer
    x = 67,072.83

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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.