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Finding the Fourth Proportional to 128,600.24, 177,471.48 and 72,023.12

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Solution

The fourth proportional to 128,600.24, 177,471.48 and 72,023.12 is: 99,393.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.24 : 177,471.48 = 72,023.12 : x
  2. Step 2: Convert to fraction form
    128,600.24/177,471.48 = 72,023.12/x
  3. Step 3: Cross multiply
    128,600.24x = 177,471.48 × 72,023.12
  4. Step 4: Simplify right side
    128,600.24x = 12,782,049,700.62
  5. Step 5: Solve for x
    x = 12,782,049,700.62/128,600.24
  6. Step 6: Final answer
    x = 99,393.67

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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.