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Finding the Fourth Proportional to 70,172.92, 105,295.83 and 53,639.20

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Solution

The fourth proportional to 70,172.92, 105,295.83 and 53,639.20 is: 80,486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,172.92 : 105,295.83 = 53,639.20 : x
  2. Step 2: Convert to fraction form
    70,172.92/105,295.83 = 53,639.20/x
  3. Step 3: Cross multiply
    70,172.92x = 105,295.83 × 53,639.20
  4. Step 4: Simplify right side
    70,172.92x = 5,647,984,084.54
  5. Step 5: Solve for x
    x = 5,647,984,084.54/70,172.92
  6. Step 6: Final answer
    x = 80,486.66

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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.