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Finding the Fourth Proportional to 139,512.65, 209,146.19 and 55,331.91

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Solution

The fourth proportional to 139,512.65, 209,146.19 and 55,331.91 is: 82,949.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,512.65 : 209,146.19 = 55,331.91 : x
  2. Step 2: Convert to fraction form
    139,512.65/209,146.19 = 55,331.91/x
  3. Step 3: Cross multiply
    139,512.65x = 209,146.19 × 55,331.91
  4. Step 4: Simplify right side
    139,512.65x = 11,572,457,885.26
  5. Step 5: Solve for x
    x = 11,572,457,885.26/139,512.65
  6. Step 6: Final answer
    x = 82,949.17

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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.