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Finding the Fourth Proportional to 69,396.55, 103,930.80 and 47,089.15

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Solution

The fourth proportional to 69,396.55, 103,930.80 and 47,089.15 is: 70,522.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,396.55 : 103,930.80 = 47,089.15 : x
  2. Step 2: Convert to fraction form
    69,396.55/103,930.80 = 47,089.15/x
  3. Step 3: Cross multiply
    69,396.55x = 103,930.80 × 47,089.15
  4. Step 4: Simplify right side
    69,396.55x = 4,894,013,030.82
  5. Step 5: Solve for x
    x = 4,894,013,030.82/69,396.55
  6. Step 6: Final answer
    x = 70,522.43

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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.