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Finding the Fourth Proportional to 139,733.70, 209,584.35 and 39,909.30

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Solution

The fourth proportional to 139,733.70, 209,584.35 and 39,909.30 is: 59,859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,733.70 : 209,584.35 = 39,909.30 : x
  2. Step 2: Convert to fraction form
    139,733.70/209,584.35 = 39,909.30/x
  3. Step 3: Cross multiply
    139,733.70x = 209,584.35 × 39,909.30
  4. Step 4: Simplify right side
    139,733.70x = 8,364,364,699.46
  5. Step 5: Solve for x
    x = 8,364,364,699.46/139,733.70
  6. Step 6: Final answer
    x = 59,859.32

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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.