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Finding the Fourth Proportional to 61,589.79, 92,360.25 and 21,053.21

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Solution

The fourth proportional to 61,589.79, 92,360.25 and 21,053.21 is: 31,571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,589.79 : 92,360.25 = 21,053.21 : x
  2. Step 2: Convert to fraction form
    61,589.79/92,360.25 = 21,053.21/x
  3. Step 3: Cross multiply
    61,589.79x = 92,360.25 × 21,053.21
  4. Step 4: Simplify right side
    61,589.79x = 1,944,479,277.10
  5. Step 5: Solve for x
    x = 1,944,479,277.10/61,589.79
  6. Step 6: Final answer
    x = 31,571.45

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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.