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Finding the Fourth Proportional to 139,424.88, 192,406.92 and 75,762.92

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Solution

The fourth proportional to 139,424.88, 192,406.92 and 75,762.92 is: 104,553.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,424.88 : 192,406.92 = 75,762.92 : x
  2. Step 2: Convert to fraction form
    139,424.88/192,406.92 = 75,762.92/x
  3. Step 3: Cross multiply
    139,424.88x = 192,406.92 × 75,762.92
  4. Step 4: Simplify right side
    139,424.88x = 14,577,310,087.41
  5. Step 5: Solve for x
    x = 14,577,310,087.41/139,424.88
  6. Step 6: Final answer
    x = 104,553.15

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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.