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Finding the Fourth Proportional to 133,079.01, 183,647.91 and 72,648.78

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Solution

The fourth proportional to 133,079.01, 183,647.91 and 72,648.78 is: 100,254.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,079.01 : 183,647.91 = 72,648.78 : x
  2. Step 2: Convert to fraction form
    133,079.01/183,647.91 = 72,648.78/x
  3. Step 3: Cross multiply
    133,079.01x = 183,647.91 × 72,648.78
  4. Step 4: Simplify right side
    133,079.01x = 13,341,796,611.05
  5. Step 5: Solve for x
    x = 13,341,796,611.05/133,079.01
  6. Step 6: Final answer
    x = 100,254.70

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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.