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Finding the Fourth Proportional to 139,393.35, 192,363.03 and 75,731.13

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Solution

The fourth proportional to 139,393.35, 192,363.03 and 75,731.13 is: 104,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,393.35 : 192,363.03 = 75,731.13 : x
  2. Step 2: Convert to fraction form
    139,393.35/192,363.03 = 75,731.13/x
  3. Step 3: Cross multiply
    139,393.35x = 192,363.03 × 75,731.13
  4. Step 4: Simplify right side
    139,393.35x = 14,567,869,632.12
  5. Step 5: Solve for x
    x = 14,567,869,632.12/139,393.35
  6. Step 6: Final answer
    x = 104,509.07

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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.