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Finding the Fourth Proportional to 78,637.96, 108,674.49 and 69,889.96

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Solution

The fourth proportional to 78,637.96, 108,674.49 and 69,889.96 is: 96,585.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,637.96 : 108,674.49 = 69,889.96 : x
  2. Step 2: Convert to fraction form
    78,637.96/108,674.49 = 69,889.96/x
  3. Step 3: Cross multiply
    78,637.96x = 108,674.49 × 69,889.96
  4. Step 4: Simplify right side
    78,637.96x = 7,595,255,759.12
  5. Step 5: Solve for x
    x = 7,595,255,759.12/78,637.96
  6. Step 6: Final answer
    x = 96,585.11

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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.