Home / 129,444.62-178,591.77-78,441.21

Finding the Fourth Proportional to 129,444.62, 178,591.77 and 78,441.21

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Solution

The fourth proportional to 129,444.62, 178,591.77 and 78,441.21 is: 108,223.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,444.62 : 178,591.77 = 78,441.21 : x
  2. Step 2: Convert to fraction form
    129,444.62/178,591.77 = 78,441.21/x
  3. Step 3: Cross multiply
    129,444.62x = 178,591.77 × 78,441.21
  4. Step 4: Simplify right side
    129,444.62x = 14,008,954,534.84
  5. Step 5: Solve for x
    x = 14,008,954,534.84/129,444.62
  6. Step 6: Final answer
    x = 108,223.54

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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.