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Finding the Fourth Proportional to 217,941.70, 326,912.55 and 77,704.90

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Solution

The fourth proportional to 217,941.70, 326,912.55 and 77,704.90 is: 116,557.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,941.70 : 326,912.55 = 77,704.90 : x
  2. Step 2: Convert to fraction form
    217,941.70/326,912.55 = 77,704.90/x
  3. Step 3: Cross multiply
    217,941.70x = 326,912.55 × 77,704.90
  4. Step 4: Simplify right side
    217,941.70x = 25,402,707,006.50
  5. Step 5: Solve for x
    x = 25,402,707,006.50/217,941.70
  6. Step 6: Final answer
    x = 116,557.35

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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.