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Finding the Fourth Proportional to 139,754.64, 209,718.12 and 89,866.56

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Solution

The fourth proportional to 139,754.64, 209,718.12 and 89,866.56 is: 134,855.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,754.64 : 209,718.12 = 89,866.56 : x
  2. Step 2: Convert to fraction form
    139,754.64/209,718.12 = 89,866.56/x
  3. Step 3: Cross multiply
    139,754.64x = 209,718.12 × 89,866.56
  4. Step 4: Simplify right side
    139,754.64x = 18,846,646,014.07
  5. Step 5: Solve for x
    x = 18,846,646,014.07/139,754.64
  6. Step 6: Final answer
    x = 134,855.24

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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.