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Finding the Fourth Proportional to 133,173.21, 183,776 and 72,744.12

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Solution

The fourth proportional to 133,173.21, 183,776 and 72,744.12 is: 100,385.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,173.21 : 183,776 = 72,744.12 : x
  2. Step 2: Convert to fraction form
    133,173.21/183,776 = 72,744.12/x
  3. Step 3: Cross multiply
    133,173.21x = 183,776 × 72,744.12
  4. Step 4: Simplify right side
    133,173.21x = 13,368,623,397.12
  5. Step 5: Solve for x
    x = 13,368,623,397.12/133,173.21
  6. Step 6: Final answer
    x = 100,385.23

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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.