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Finding the Fourth Proportional to 133,170.12, 183,712.86 and 79,422.84

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Solution

The fourth proportional to 133,170.12, 183,712.86 and 79,422.84 is: 109,566.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,170.12 : 183,712.86 = 79,422.84 : x
  2. Step 2: Convert to fraction form
    133,170.12/183,712.86 = 79,422.84/x
  3. Step 3: Cross multiply
    133,170.12x = 183,712.86 × 79,422.84
  4. Step 4: Simplify right side
    133,170.12x = 14,590,997,085.72
  5. Step 5: Solve for x
    x = 14,590,997,085.72/133,170.12
  6. Step 6: Final answer
    x = 109,566.60

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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.