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Finding the Fourth Proportional to 78,771.80, 118,049.70 and 50,605.40

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Solution

The fourth proportional to 78,771.80, 118,049.70 and 50,605.40 is: 75,838.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,771.80 : 118,049.70 = 50,605.40 : x
  2. Step 2: Convert to fraction form
    78,771.80/118,049.70 = 50,605.40/x
  3. Step 3: Cross multiply
    78,771.80x = 118,049.70 × 50,605.40
  4. Step 4: Simplify right side
    78,771.80x = 5,973,952,288.38
  5. Step 5: Solve for x
    x = 5,973,952,288.38/78,771.80
  6. Step 6: Final answer
    x = 75,838.72

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1.5x scale

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.