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Finding the Fourth Proportional to 63,491.70, 87,618.55 and 34,420.17

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Solution

The fourth proportional to 63,491.70, 87,618.55 and 34,420.17 is: 47,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,491.70 : 87,618.55 = 34,420.17 : x
  2. Step 2: Convert to fraction form
    63,491.70/87,618.55 = 34,420.17/x
  3. Step 3: Cross multiply
    63,491.70x = 87,618.55 × 34,420.17
  4. Step 4: Simplify right side
    63,491.70x = 3,015,844,905.53
  5. Step 5: Solve for x
    x = 3,015,844,905.53/63,491.70
  6. Step 6: Final answer
    x = 47,499.83

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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.