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Finding the Fourth Proportional to 61,939.49, 85,490.11 and 40,720.73

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Solution

The fourth proportional to 61,939.49, 85,490.11 and 40,720.73 is: 56,203.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,939.49 : 85,490.11 = 40,720.73 : x
  2. Step 2: Convert to fraction form
    61,939.49/85,490.11 = 40,720.73/x
  3. Step 3: Cross multiply
    61,939.49x = 85,490.11 × 40,720.73
  4. Step 4: Simplify right side
    61,939.49x = 3,481,219,686.98
  5. Step 5: Solve for x
    x = 3,481,219,686.98/61,939.49
  6. Step 6: Final answer
    x = 56,203.56

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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.