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Finding the Fourth Proportional to 70,042.73, 105,033.12 and 20,111.24

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Solution

The fourth proportional to 70,042.73, 105,033.12 and 20,111.24 is: 30,157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,042.73 : 105,033.12 = 20,111.24 : x
  2. Step 2: Convert to fraction form
    70,042.73/105,033.12 = 20,111.24/x
  3. Step 3: Cross multiply
    70,042.73x = 105,033.12 × 20,111.24
  4. Step 4: Simplify right side
    70,042.73x = 2,112,346,284.27
  5. Step 5: Solve for x
    x = 2,112,346,284.27/70,042.73
  6. Step 6: Final answer
    x = 30,157.97

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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.