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Finding the Fourth Proportional to 111,650.40, 167,281.20 and 72,187.20

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Solution

The fourth proportional to 111,650.40, 167,281.20 and 72,187.20 is: 108,155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,650.40 : 167,281.20 = 72,187.20 : x
  2. Step 2: Convert to fraction form
    111,650.40/167,281.20 = 72,187.20/x
  3. Step 3: Cross multiply
    111,650.40x = 167,281.20 × 72,187.20
  4. Step 4: Simplify right side
    111,650.40x = 12,075,561,440.64
  5. Step 5: Solve for x
    x = 12,075,561,440.64/111,650.40
  6. Step 6: Final answer
    x = 108,155.11

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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.