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Finding the Fourth Proportional to 113,000.84, 155,999.22 and 79,615.88

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Solution

The fourth proportional to 113,000.84, 155,999.22 and 79,615.88 is: 109,910.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,000.84 : 155,999.22 = 79,615.88 : x
  2. Step 2: Convert to fraction form
    113,000.84/155,999.22 = 79,615.88/x
  3. Step 3: Cross multiply
    113,000.84x = 155,999.22 × 79,615.88
  4. Step 4: Simplify right side
    113,000.84x = 12,420,015,179.61
  5. Step 5: Solve for x
    x = 12,420,015,179.61/113,000.84
  6. Step 6: Final answer
    x = 109,910.82

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1.5x scale

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.