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Finding the Fourth Proportional to 111,643.88, 167,607.96 and 72,365.36

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Solution

The fourth proportional to 111,643.88, 167,607.96 and 72,365.36 is: 108,640.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,643.88 : 167,607.96 = 72,365.36 : x
  2. Step 2: Convert to fraction form
    111,643.88/167,607.96 = 72,365.36/x
  3. Step 3: Cross multiply
    111,643.88x = 167,607.96 × 72,365.36
  4. Step 4: Simplify right side
    111,643.88x = 12,129,010,364.27
  5. Step 5: Solve for x
    x = 12,129,010,364.27/111,643.88
  6. Step 6: Final answer
    x = 108,640.17

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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.