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Finding the Fourth Proportional to 79,424.84, 109,621.80 and 49,223.58

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Solution

The fourth proportional to 79,424.84, 109,621.80 and 49,223.58 is: 67,938.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,424.84 : 109,621.80 = 49,223.58 : x
  2. Step 2: Convert to fraction form
    79,424.84/109,621.80 = 49,223.58/x
  3. Step 3: Cross multiply
    79,424.84x = 109,621.80 × 49,223.58
  4. Step 4: Simplify right side
    79,424.84x = 5,395,977,442.04
  5. Step 5: Solve for x
    x = 5,395,977,442.04/79,424.84
  6. Step 6: Final answer
    x = 67,938.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.