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Finding the Fourth Proportional to 62,259, 85,917.42 and 39,903

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Solution

The fourth proportional to 62,259, 85,917.42 and 39,903 is: 55,066.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,259 : 85,917.42 = 39,903 : x
  2. Step 2: Convert to fraction form
    62,259/85,917.42 = 39,903/x
  3. Step 3: Cross multiply
    62,259x = 85,917.42 × 39,903
  4. Step 4: Simplify right side
    62,259x = 3,428,362,810.26
  5. Step 5: Solve for x
    x = 3,428,362,810.26/62,259
  6. Step 6: Final answer
    x = 55,066.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.