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Finding the Fourth Proportional to 70,544.53, 105,815.63 and 28,423.58

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Solution

The fourth proportional to 70,544.53, 105,815.63 and 28,423.58 is: 42,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,544.53 : 105,815.63 = 28,423.58 : x
  2. Step 2: Convert to fraction form
    70,544.53/105,815.63 = 28,423.58/x
  3. Step 3: Cross multiply
    70,544.53x = 105,815.63 × 28,423.58
  4. Step 4: Simplify right side
    70,544.53x = 3,007,658,882.44
  5. Step 5: Solve for x
    x = 3,007,658,882.44/70,544.53
  6. Step 6: Final answer
    x = 42,634.90

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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.