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Finding the Fourth Proportional to 111,234.87, 153,512.55 and 63,491.31

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Solution

The fourth proportional to 111,234.87, 153,512.55 and 63,491.31 is: 87,622.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,234.87 : 153,512.55 = 63,491.31 : x
  2. Step 2: Convert to fraction form
    111,234.87/153,512.55 = 63,491.31/x
  3. Step 3: Cross multiply
    111,234.87x = 153,512.55 × 63,491.31
  4. Step 4: Simplify right side
    111,234.87x = 9,746,712,900.94
  5. Step 5: Solve for x
    x = 9,746,712,900.94/111,234.87
  6. Step 6: Final answer
    x = 87,622.82

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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.