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Finding the Fourth Proportional to 139,463.94, 209,145.29 and 76,330.70

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Solution

The fourth proportional to 139,463.94, 209,145.29 and 76,330.70 is: 114,468.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,463.94 : 209,145.29 = 76,330.70 : x
  2. Step 2: Convert to fraction form
    139,463.94/209,145.29 = 76,330.70/x
  3. Step 3: Cross multiply
    139,463.94x = 209,145.29 × 76,330.70
  4. Step 4: Simplify right side
    139,463.94x = 15,964,206,387.40
  5. Step 5: Solve for x
    x = 15,964,206,387.40/139,463.94
  6. Step 6: Final answer
    x = 114,468.34

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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.