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Finding the Fourth Proportional to 113,040.54, 155,991.91 and 63,981.11

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Solution

The fourth proportional to 113,040.54, 155,991.91 and 63,981.11 is: 88,291.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,040.54 : 155,991.91 = 63,981.11 : x
  2. Step 2: Convert to fraction form
    113,040.54/155,991.91 = 63,981.11/x
  3. Step 3: Cross multiply
    113,040.54x = 155,991.91 × 63,981.11
  4. Step 4: Simplify right side
    113,040.54x = 9,980,536,020.85
  5. Step 5: Solve for x
    x = 9,980,536,020.85/113,040.54
  6. Step 6: Final answer
    x = 88,291.65

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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.