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Finding the Fourth Proportional to 61,898.63, 85,439.57 and 39,542.63

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Solution

The fourth proportional to 61,898.63, 85,439.57 and 39,542.63 is: 54,581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,898.63 : 85,439.57 = 39,542.63 : x
  2. Step 2: Convert to fraction form
    61,898.63/85,439.57 = 39,542.63/x
  3. Step 3: Cross multiply
    61,898.63x = 85,439.57 × 39,542.63
  4. Step 4: Simplify right side
    61,898.63x = 3,378,504,678.96
  5. Step 5: Solve for x
    x = 3,378,504,678.96/61,898.63
  6. Step 6: Final answer
    x = 54,581.26

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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.