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Finding the Fourth Proportional to 139,390.24, 192,359.45 and 75,728.02

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Solution

The fourth proportional to 139,390.24, 192,359.45 and 75,728.02 is: 104,505.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,390.24 : 192,359.45 = 75,728.02 : x
  2. Step 2: Convert to fraction form
    139,390.24/192,359.45 = 75,728.02/x
  3. Step 3: Cross multiply
    139,390.24x = 192,359.45 × 75,728.02
  4. Step 4: Simplify right side
    139,390.24x = 14,566,998,936.35
  5. Step 5: Solve for x
    x = 14,566,998,936.35/139,390.24
  6. Step 6: Final answer
    x = 104,505.16

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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.