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Finding the Fourth Proportional to 111,869.76, 167,810.88 and 45,308.16

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Solution

The fourth proportional to 111,869.76, 167,810.88 and 45,308.16 is: 67,964.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,869.76 : 167,810.88 = 45,308.16 : x
  2. Step 2: Convert to fraction form
    111,869.76/167,810.88 = 45,308.16/x
  3. Step 3: Cross multiply
    111,869.76x = 167,810.88 × 45,308.16
  4. Step 4: Simplify right side
    111,869.76x = 7,603,202,200.78
  5. Step 5: Solve for x
    x = 7,603,202,200.78/111,869.76
  6. Step 6: Final answer
    x = 67,964.77

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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.