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Finding the Fourth Proportional to 128,601.56, 177,468.22 and 71,240.70

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Solution

The fourth proportional to 128,601.56, 177,468.22 and 71,240.70 is: 98,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,601.56 : 177,468.22 = 71,240.70 : x
  2. Step 2: Convert to fraction form
    128,601.56/177,468.22 = 71,240.70/x
  3. Step 3: Cross multiply
    128,601.56x = 177,468.22 × 71,240.70
  4. Step 4: Simplify right side
    128,601.56x = 12,642,960,220.55
  5. Step 5: Solve for x
    x = 12,642,960,220.55/128,601.56
  6. Step 6: Final answer
    x = 98,311.10

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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.