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Finding the Fourth Proportional to 139,655.99, 209,587.92 and 68,616.76

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Solution

The fourth proportional to 139,655.99, 209,587.92 and 68,616.76 is: 102,976.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,655.99 : 209,587.92 = 68,616.76 : x
  2. Step 2: Convert to fraction form
    139,655.99/209,587.92 = 68,616.76/x
  3. Step 3: Cross multiply
    139,655.99x = 209,587.92 × 68,616.76
  4. Step 4: Simplify right side
    139,655.99x = 14,381,244,010.21
  5. Step 5: Solve for x
    x = 14,381,244,010.21/139,655.99
  6. Step 6: Final answer
    x = 102,976.21

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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.