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Finding the Fourth Proportional to 61,647.78, 85,073.97 and 42,795.84

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Solution

The fourth proportional to 61,647.78, 85,073.97 and 42,795.84 is: 59,058.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,647.78 : 85,073.97 = 42,795.84 : x
  2. Step 2: Convert to fraction form
    61,647.78/85,073.97 = 42,795.84/x
  3. Step 3: Cross multiply
    61,647.78x = 85,073.97 × 42,795.84
  4. Step 4: Simplify right side
    61,647.78x = 3,640,812,008.28
  5. Step 5: Solve for x
    x = 3,640,812,008.28/61,647.78
  6. Step 6: Final answer
    x = 59,058.28

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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.