Home / 139,380.19-209,141.80-68,301.50

Finding the Fourth Proportional to 139,380.19, 209,141.80 and 68,301.50

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Solution

The fourth proportional to 139,380.19, 209,141.80 and 68,301.50 is: 102,487.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,380.19 : 209,141.80 = 68,301.50 : x
  2. Step 2: Convert to fraction form
    139,380.19/209,141.80 = 68,301.50/x
  3. Step 3: Cross multiply
    139,380.19x = 209,141.80 × 68,301.50
  4. Step 4: Simplify right side
    139,380.19x = 14,284,697,436.24
  5. Step 5: Solve for x
    x = 14,284,697,436.24/139,380.19
  6. Step 6: Final answer
    x = 102,487.29

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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.