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Finding the Fourth Proportional to 139,609.77, 209,411.94 and 39,770.61

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Solution

The fourth proportional to 139,609.77, 209,411.94 and 39,770.61 is: 59,655.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,609.77 : 209,411.94 = 39,770.61 : x
  2. Step 2: Convert to fraction form
    139,609.77/209,411.94 = 39,770.61/x
  3. Step 3: Cross multiply
    139,609.77x = 209,411.94 × 39,770.61
  4. Step 4: Simplify right side
    139,609.77x = 8,328,440,595.08
  5. Step 5: Solve for x
    x = 8,328,440,595.08/139,609.77
  6. Step 6: Final answer
    x = 59,655.14

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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.