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Finding the Fourth Proportional to 61,127.96, 91,687.70 and 21,137.65

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Solution

The fourth proportional to 61,127.96, 91,687.70 and 21,137.65 is: 31,705.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,127.96 : 91,687.70 = 21,137.65 : x
  2. Step 2: Convert to fraction form
    61,127.96/91,687.70 = 21,137.65/x
  3. Step 3: Cross multiply
    61,127.96x = 91,687.70 × 21,137.65
  4. Step 4: Simplify right side
    61,127.96x = 1,938,062,335.53
  5. Step 5: Solve for x
    x = 1,938,062,335.53/61,127.96
  6. Step 6: Final answer
    x = 31,705.01

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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.