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Finding the Fourth Proportional to 61,395.77, 84,678.17 and 39,892.44

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Solution

The fourth proportional to 61,395.77, 84,678.17 and 39,892.44 is: 55,020.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,395.77 : 84,678.17 = 39,892.44 : x
  2. Step 2: Convert to fraction form
    61,395.77/84,678.17 = 39,892.44/x
  3. Step 3: Cross multiply
    61,395.77x = 84,678.17 × 39,892.44
  4. Step 4: Simplify right side
    61,395.77x = 3,378,018,616.57
  5. Step 5: Solve for x
    x = 3,378,018,616.57/61,395.77
  6. Step 6: Final answer
    x = 55,020.38

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1.5x scale

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.