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Finding the Fourth Proportional to 111,623.40, 167,435.10 and 28,517.40

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Solution

The fourth proportional to 111,623.40, 167,435.10 and 28,517.40 is: 42,776.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,623.40 : 167,435.10 = 28,517.40 : x
  2. Step 2: Convert to fraction form
    111,623.40/167,435.10 = 28,517.40/x
  3. Step 3: Cross multiply
    111,623.40x = 167,435.10 × 28,517.40
  4. Step 4: Simplify right side
    111,623.40x = 4,774,813,720.74
  5. Step 5: Solve for x
    x = 4,774,813,720.74/111,623.40
  6. Step 6: Final answer
    x = 42,776.10

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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.