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Finding the Fourth Proportional to 69,396.80, 103,931.18 and 47,089.40

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Solution

The fourth proportional to 69,396.80, 103,931.18 and 47,089.40 is: 70,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,396.80 : 103,931.18 = 47,089.40 : x
  2. Step 2: Convert to fraction form
    69,396.80/103,931.18 = 47,089.40/x
  3. Step 3: Cross multiply
    69,396.80x = 103,931.18 × 47,089.40
  4. Step 4: Simplify right side
    69,396.80x = 4,894,056,672.05
  5. Step 5: Solve for x
    x = 4,894,056,672.05/69,396.80
  6. Step 6: Final answer
    x = 70,522.80

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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.