Home / 128,919.24-177,905.77-71,555.20

Finding the Fourth Proportional to 128,919.24, 177,905.77 and 71,555.20

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Solution

The fourth proportional to 128,919.24, 177,905.77 and 71,555.20 is: 98,744.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,919.24 : 177,905.77 = 71,555.20 : x
  2. Step 2: Convert to fraction form
    128,919.24/177,905.77 = 71,555.20/x
  3. Step 3: Cross multiply
    128,919.24x = 177,905.77 × 71,555.20
  4. Step 4: Simplify right side
    128,919.24x = 12,730,082,329.85
  5. Step 5: Solve for x
    x = 12,730,082,329.85/128,919.24
  6. Step 6: Final answer
    x = 98,744.63

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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.