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Finding the Fourth Proportional to 139,911.21, 209,691.09 and 59,855.13

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Solution

The fourth proportional to 139,911.21, 209,691.09 and 59,855.13 is: 89,707.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,911.21 : 209,691.09 = 59,855.13 : x
  2. Step 2: Convert to fraction form
    139,911.21/209,691.09 = 59,855.13/x
  3. Step 3: Cross multiply
    139,911.21x = 209,691.09 × 59,855.13
  4. Step 4: Simplify right side
    139,911.21x = 12,551,087,451.79
  5. Step 5: Solve for x
    x = 12,551,087,451.79/139,911.21
  6. Step 6: Final answer
    x = 89,707.52

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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.