Home / 129,575.58-178,817.26-72,220.80

Finding the Fourth Proportional to 129,575.58, 178,817.26 and 72,220.80

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Solution

The fourth proportional to 129,575.58, 178,817.26 and 72,220.80 is: 99,666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,575.58 : 178,817.26 = 72,220.80 : x
  2. Step 2: Convert to fraction form
    129,575.58/178,817.26 = 72,220.80/x
  3. Step 3: Cross multiply
    129,575.58x = 178,817.26 × 72,220.80
  4. Step 4: Simplify right side
    129,575.58x = 12,914,325,571.01
  5. Step 5: Solve for x
    x = 12,914,325,571.01/129,575.58
  6. Step 6: Final answer
    x = 99,666.35

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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.