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Finding the Fourth Proportional to 70,007.76, 105,012.72 and 20,092.32

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Solution

The fourth proportional to 70,007.76, 105,012.72 and 20,092.32 is: 30,138.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,007.76 : 105,012.72 = 20,092.32 : x
  2. Step 2: Convert to fraction form
    70,007.76/105,012.72 = 20,092.32/x
  3. Step 3: Cross multiply
    70,007.76x = 105,012.72 × 20,092.32
  4. Step 4: Simplify right side
    70,007.76x = 2,109,949,174.31
  5. Step 5: Solve for x
    x = 2,109,949,174.31/70,007.76
  6. Step 6: Final answer
    x = 30,138.79

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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.