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Finding the Fourth Proportional to 78,869.64, 108,838.44 and 43,057.92

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Solution

The fourth proportional to 78,869.64, 108,838.44 and 43,057.92 is: 59,419.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,869.64 : 108,838.44 = 43,057.92 : x
  2. Step 2: Convert to fraction form
    78,869.64/108,838.44 = 43,057.92/x
  3. Step 3: Cross multiply
    78,869.64x = 108,838.44 × 43,057.92
  4. Step 4: Simplify right side
    78,869.64x = 4,686,356,842.44
  5. Step 5: Solve for x
    x = 4,686,356,842.44/78,869.64
  6. Step 6: Final answer
    x = 59,419.02

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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.