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Finding the Fourth Proportional to 79,686.64, 109,963.44 and 43,869.72

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Solution

The fourth proportional to 79,686.64, 109,963.44 and 43,869.72 is: 60,537.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.64 : 109,963.44 = 43,869.72 : x
  2. Step 2: Convert to fraction form
    79,686.64/109,963.44 = 43,869.72/x
  3. Step 3: Cross multiply
    79,686.64x = 109,963.44 × 43,869.72
  4. Step 4: Simplify right side
    79,686.64x = 4,824,065,323.04
  5. Step 5: Solve for x
    x = 4,824,065,323.04/79,686.64
  6. Step 6: Final answer
    x = 60,537.94

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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.