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Finding the Fourth Proportional to 128,602.24, 177,474.24 and 72,025.12

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Solution

The fourth proportional to 128,602.24, 177,474.24 and 72,025.12 is: 99,396.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.24 : 177,474.24 = 72,025.12 : x
  2. Step 2: Convert to fraction form
    128,602.24/177,474.24 = 72,025.12/x
  3. Step 3: Cross multiply
    128,602.24x = 177,474.24 × 72,025.12
  4. Step 4: Simplify right side
    128,602.24x = 12,782,603,432.91
  5. Step 5: Solve for x
    x = 12,782,603,432.91/128,602.24
  6. Step 6: Final answer
    x = 99,396.43

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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.