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Finding the Fourth Proportional to 111,589.41, 154,020.21 and 63,870.45

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Solution

The fourth proportional to 111,589.41, 154,020.21 and 63,870.45 is: 88,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,589.41 : 154,020.21 = 63,870.45 : x
  2. Step 2: Convert to fraction form
    111,589.41/154,020.21 = 63,870.45/x
  3. Step 3: Cross multiply
    111,589.41x = 154,020.21 × 63,870.45
  4. Step 4: Simplify right side
    111,589.41x = 9,837,340,121.79
  5. Step 5: Solve for x
    x = 9,837,340,121.79/111,589.41
  6. Step 6: Final answer
    x = 88,156.57

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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.