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Finding the Fourth Proportional to 60,872.32, 91,323.24 and 19,319.68

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Solution

The fourth proportional to 60,872.32, 91,323.24 and 19,319.68 is: 28,984.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,872.32 : 91,323.24 = 19,319.68 : x
  2. Step 2: Convert to fraction form
    60,872.32/91,323.24 = 19,319.68/x
  3. Step 3: Cross multiply
    60,872.32x = 91,323.24 × 19,319.68
  4. Step 4: Simplify right side
    60,872.32x = 1,764,335,773.36
  5. Step 5: Solve for x
    x = 1,764,335,773.36/60,872.32
  6. Step 6: Final answer
    x = 28,984.20

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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.