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Finding the Fourth Proportional to 62,250, 85,905 and 39,894

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Solution

The fourth proportional to 62,250, 85,905 and 39,894 is: 55,053.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,250 : 85,905 = 39,894 : x
  2. Step 2: Convert to fraction form
    62,250/85,905 = 39,894/x
  3. Step 3: Cross multiply
    62,250x = 85,905 × 39,894
  4. Step 4: Simplify right side
    62,250x = 3,427,094,070
  5. Step 5: Solve for x
    x = 3,427,094,070/62,250
  6. Step 6: Final answer
    x = 55,053.72

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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.