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Finding the Fourth Proportional to 71,639.92, 98,863.52 and 39,374.20

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Solution

The fourth proportional to 71,639.92, 98,863.52 and 39,374.20 is: 54,336.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,639.92 : 98,863.52 = 39,374.20 : x
  2. Step 2: Convert to fraction form
    71,639.92/98,863.52 = 39,374.20/x
  3. Step 3: Cross multiply
    71,639.92x = 98,863.52 × 39,374.20
  4. Step 4: Simplify right side
    71,639.92x = 3,892,672,009.18
  5. Step 5: Solve for x
    x = 3,892,672,009.18/71,639.92
  6. Step 6: Final answer
    x = 54,336.63

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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.