Home / 208,199.11-312,427.15-81,817.16

Finding the Fourth Proportional to 208,199.11, 312,427.15 and 81,817.16

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Solution

The fourth proportional to 208,199.11, 312,427.15 and 81,817.16 is: 122,776.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,199.11 : 312,427.15 = 81,817.16 : x
  2. Step 2: Convert to fraction form
    208,199.11/312,427.15 = 81,817.16/x
  3. Step 3: Cross multiply
    208,199.11x = 312,427.15 × 81,817.16
  4. Step 4: Simplify right side
    208,199.11x = 25,561,902,119.89
  5. Step 5: Solve for x
    x = 25,561,902,119.89/208,199.11
  6. Step 6: Final answer
    x = 122,776.23

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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.