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Finding the Fourth Proportional to 78,343.64, 108,120.91 and 44,358.11

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Solution

The fourth proportional to 78,343.64, 108,120.91 and 44,358.11 is: 61,217.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343.64 : 108,120.91 = 44,358.11 : x
  2. Step 2: Convert to fraction form
    78,343.64/108,120.91 = 44,358.11/x
  3. Step 3: Cross multiply
    78,343.64x = 108,120.91 × 44,358.11
  4. Step 4: Simplify right side
    78,343.64x = 4,796,039,378.49
  5. Step 5: Solve for x
    x = 4,796,039,378.49/78,343.64
  6. Step 6: Final answer
    x = 61,217.98

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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.