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Finding the Fourth Proportional to 78,813.70, 108,803.02 and 60,868.42

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Solution

The fourth proportional to 78,813.70, 108,803.02 and 60,868.42 is: 84,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.70 : 108,803.02 = 60,868.42 : x
  2. Step 2: Convert to fraction form
    78,813.70/108,803.02 = 60,868.42/x
  3. Step 3: Cross multiply
    78,813.70x = 108,803.02 × 60,868.42
  4. Step 4: Simplify right side
    78,813.70x = 6,622,667,918.63
  5. Step 5: Solve for x
    x = 6,622,667,918.63/78,813.70
  6. Step 6: Final answer
    x = 84,029.40

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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.