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Finding the Fourth Proportional to 61,121.61, 91,660.55 and 33,062.40

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Solution

The fourth proportional to 61,121.61, 91,660.55 and 33,062.40 is: 49,581.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,121.61 : 91,660.55 = 33,062.40 : x
  2. Step 2: Convert to fraction form
    61,121.61/91,660.55 = 33,062.40/x
  3. Step 3: Cross multiply
    61,121.61x = 91,660.55 × 33,062.40
  4. Step 4: Simplify right side
    61,121.61x = 3,030,517,603.01
  5. Step 5: Solve for x
    x = 3,030,517,603.01/61,121.61
  6. Step 6: Final answer
    x = 49,581.77

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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.