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Finding the Fourth Proportional to 133,231.56, 183,859.38 and 72,803.40

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Solution

The fourth proportional to 133,231.56, 183,859.38 and 72,803.40 is: 100,468.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,231.56 : 183,859.38 = 72,803.40 : x
  2. Step 2: Convert to fraction form
    133,231.56/183,859.38 = 72,803.40/x
  3. Step 3: Cross multiply
    133,231.56x = 183,859.38 × 72,803.40
  4. Step 4: Simplify right side
    133,231.56x = 13,385,587,985.89
  5. Step 5: Solve for x
    x = 13,385,587,985.89/133,231.56
  6. Step 6: Final answer
    x = 100,468.60

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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.