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Finding the Fourth Proportional to 78,953.81, 108,951.66 and 43,144.11

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Solution

The fourth proportional to 78,953.81, 108,951.66 and 43,144.11 is: 59,536.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.81 : 108,951.66 = 43,144.11 : x
  2. Step 2: Convert to fraction form
    78,953.81/108,951.66 = 43,144.11/x
  3. Step 3: Cross multiply
    78,953.81x = 108,951.66 × 43,144.11
  4. Step 4: Simplify right side
    78,953.81x = 4,700,622,403.72
  5. Step 5: Solve for x
    x = 4,700,622,403.72/78,953.81
  6. Step 6: Final answer
    x = 59,536.36

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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.