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Finding the Fourth Proportional to 139,637.76, 209,469.60 and 56,538.24

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Solution

The fourth proportional to 139,637.76, 209,469.60 and 56,538.24 is: 84,812.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,637.76 : 209,469.60 = 56,538.24 : x
  2. Step 2: Convert to fraction form
    139,637.76/209,469.60 = 56,538.24/x
  3. Step 3: Cross multiply
    139,637.76x = 209,469.60 × 56,538.24
  4. Step 4: Simplify right side
    139,637.76x = 11,843,042,517.50
  5. Step 5: Solve for x
    x = 11,843,042,517.50/139,637.76
  6. Step 6: Final answer
    x = 84,812.61

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1.5x scale

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.