Home / 129,928.32-179,270.55-78,939.54

Finding the Fourth Proportional to 129,928.32, 179,270.55 and 78,939.54

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Solution

The fourth proportional to 129,928.32, 179,270.55 and 78,939.54 is: 108,918.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,928.32 : 179,270.55 = 78,939.54 : x
  2. Step 2: Convert to fraction form
    129,928.32/179,270.55 = 78,939.54/x
  3. Step 3: Cross multiply
    129,928.32x = 179,270.55 × 78,939.54
  4. Step 4: Simplify right side
    129,928.32x = 14,151,534,752.55
  5. Step 5: Solve for x
    x = 14,151,534,752.55/129,928.32
  6. Step 6: Final answer
    x = 108,918.02

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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.