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Finding the Fourth Proportional to 139,203.50, 192,100.84 and 78,772.92

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Solution

The fourth proportional to 139,203.50, 192,100.84 and 78,772.92 is: 108,706.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,203.50 : 192,100.84 = 78,772.92 : x
  2. Step 2: Convert to fraction form
    139,203.50/192,100.84 = 78,772.92/x
  3. Step 3: Cross multiply
    139,203.50x = 192,100.84 × 78,772.92
  4. Step 4: Simplify right side
    139,203.50x = 15,132,344,101.25
  5. Step 5: Solve for x
    x = 15,132,344,101.25/139,203.50
  6. Step 6: Final answer
    x = 108,706.64

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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.