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Finding the Fourth Proportional to 129,726, 179,021.88 and 70,110

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Solution

The fourth proportional to 129,726, 179,021.88 and 70,110 is: 96,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,726 : 179,021.88 = 70,110 : x
  2. Step 2: Convert to fraction form
    129,726/179,021.88 = 70,110/x
  3. Step 3: Cross multiply
    129,726x = 179,021.88 × 70,110
  4. Step 4: Simplify right side
    129,726x = 12,551,224,006.80
  5. Step 5: Solve for x
    x = 12,551,224,006.80/129,726
  6. Step 6: Final answer
    x = 96,751.80

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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.