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Finding the Fourth Proportional to 139,336.32, 209,076.48 and 69,214.08

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Solution

The fourth proportional to 139,336.32, 209,076.48 and 69,214.08 is: 103,856.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,336.32 : 209,076.48 = 69,214.08 : x
  2. Step 2: Convert to fraction form
    139,336.32/209,076.48 = 69,214.08/x
  3. Step 3: Cross multiply
    139,336.32x = 209,076.48 × 69,214.08
  4. Step 4: Simplify right side
    139,336.32x = 14,471,036,212.84
  5. Step 5: Solve for x
    x = 14,471,036,212.84/139,336.32
  6. Step 6: Final answer
    x = 103,856.89

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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.