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Finding the Fourth Proportional to 139,954.08, 209,785.32 and 61,047.12

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Solution

The fourth proportional to 139,954.08, 209,785.32 and 61,047.12 is: 91,507.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,954.08 : 209,785.32 = 61,047.12 : x
  2. Step 2: Convert to fraction form
    139,954.08/209,785.32 = 61,047.12/x
  3. Step 3: Cross multiply
    139,954.08x = 209,785.32 × 61,047.12
  4. Step 4: Simplify right side
    139,954.08x = 12,806,789,604.28
  5. Step 5: Solve for x
    x = 12,806,789,604.28/139,954.08
  6. Step 6: Final answer
    x = 91,507.08

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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.