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Finding the Fourth Proportional to 80,513.71, 120,639.34 and 63,783.16

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Solution

The fourth proportional to 80,513.71, 120,639.34 and 63,783.16 is: 95,570.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,513.71 : 120,639.34 = 63,783.16 : x
  2. Step 2: Convert to fraction form
    80,513.71/120,639.34 = 63,783.16/x
  3. Step 3: Cross multiply
    80,513.71x = 120,639.34 × 63,783.16
  4. Step 4: Simplify right side
    80,513.71x = 7,694,758,782.24
  5. Step 5: Solve for x
    x = 7,694,758,782.24/80,513.71
  6. Step 6: Final answer
    x = 95,570.79

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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.