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Finding the Fourth Proportional to 61,216.74, 91,818.63 and 19,660.50

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Solution

The fourth proportional to 61,216.74, 91,818.63 and 19,660.50 is: 29,488.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,216.74 : 91,818.63 = 19,660.50 : x
  2. Step 2: Convert to fraction form
    61,216.74/91,818.63 = 19,660.50/x
  3. Step 3: Cross multiply
    61,216.74x = 91,818.63 × 19,660.50
  4. Step 4: Simplify right side
    61,216.74x = 1,805,200,175.12
  5. Step 5: Solve for x
    x = 1,805,200,175.12/61,216.74
  6. Step 6: Final answer
    x = 29,488.67

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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.