Home / 128,328.15-177,093.24-71,739.52

Finding the Fourth Proportional to 128,328.15, 177,093.24 and 71,739.52

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Solution

The fourth proportional to 128,328.15, 177,093.24 and 71,739.52 is: 99,000.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328.15 : 177,093.24 = 71,739.52 : x
  2. Step 2: Convert to fraction form
    128,328.15/177,093.24 = 71,739.52/x
  3. Step 3: Cross multiply
    128,328.15x = 177,093.24 × 71,739.52
  4. Step 4: Simplify right side
    128,328.15x = 12,704,584,317.24
  5. Step 5: Solve for x
    x = 12,704,584,317.24/128,328.15
  6. Step 6: Final answer
    x = 99,000.76

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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.