Home / 129,360.38-178,533.72-72,782.69

Finding the Fourth Proportional to 129,360.38, 178,533.72 and 72,782.69

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Solution

The fourth proportional to 129,360.38, 178,533.72 and 72,782.69 is: 100,449.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,360.38 : 178,533.72 = 72,782.69 : x
  2. Step 2: Convert to fraction form
    129,360.38/178,533.72 = 72,782.69/x
  3. Step 3: Cross multiply
    129,360.38x = 178,533.72 × 72,782.69
  4. Step 4: Simplify right side
    129,360.38x = 12,994,163,504.64
  5. Step 5: Solve for x
    x = 12,994,163,504.64/129,360.38
  6. Step 6: Final answer
    x = 100,449.33

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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.