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Finding the Fourth Proportional to 61,247.89, 84,541.90 and 39,699.61

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Solution

The fourth proportional to 61,247.89, 84,541.90 and 39,699.61 is: 54,798.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,247.89 : 84,541.90 = 39,699.61 : x
  2. Step 2: Convert to fraction form
    61,247.89/84,541.90 = 39,699.61/x
  3. Step 3: Cross multiply
    61,247.89x = 84,541.90 × 39,699.61
  4. Step 4: Simplify right side
    61,247.89x = 3,356,280,458.66
  5. Step 5: Solve for x
    x = 3,356,280,458.66/61,247.89
  6. Step 6: Final answer
    x = 54,798.31

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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.