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Finding the Fourth Proportional to 78,769.80, 118,046.70 and 50,603.40

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Solution

The fourth proportional to 78,769.80, 118,046.70 and 50,603.40 is: 75,835.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,769.80 : 118,046.70 = 50,603.40 : x
  2. Step 2: Convert to fraction form
    78,769.80/118,046.70 = 50,603.40/x
  3. Step 3: Cross multiply
    78,769.80x = 118,046.70 × 50,603.40
  4. Step 4: Simplify right side
    78,769.80x = 5,973,564,378.78
  5. Step 5: Solve for x
    x = 5,973,564,378.78/78,769.80
  6. Step 6: Final answer
    x = 75,835.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.