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Finding the Fourth Proportional to 61,881.80, 92,822.70 and 57,945.20

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Solution

The fourth proportional to 61,881.80, 92,822.70 and 57,945.20 is: 86,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,881.80 : 92,822.70 = 57,945.20 : x
  2. Step 2: Convert to fraction form
    61,881.80/92,822.70 = 57,945.20/x
  3. Step 3: Cross multiply
    61,881.80x = 92,822.70 × 57,945.20
  4. Step 4: Simplify right side
    61,881.80x = 5,378,629,916.04
  5. Step 5: Solve for x
    x = 5,378,629,916.04/61,881.80
  6. Step 6: Final answer
    x = 86,917.80

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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.