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Finding the Fourth Proportional to 71,228.76, 98,293.74 and 39,396.60

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Solution

The fourth proportional to 71,228.76, 98,293.74 and 39,396.60 is: 54,366.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,228.76 : 98,293.74 = 39,396.60 : x
  2. Step 2: Convert to fraction form
    71,228.76/98,293.74 = 39,396.60/x
  3. Step 3: Cross multiply
    71,228.76x = 98,293.74 × 39,396.60
  4. Step 4: Simplify right side
    71,228.76x = 3,872,439,157.28
  5. Step 5: Solve for x
    x = 3,872,439,157.28/71,228.76
  6. Step 6: Final answer
    x = 54,366.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.