Home / 128,512.17-177,336.95-71,915.85

Finding the Fourth Proportional to 128,512.17, 177,336.95 and 71,915.85

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Solution

The fourth proportional to 128,512.17, 177,336.95 and 71,915.85 is: 99,238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,512.17 : 177,336.95 = 71,915.85 : x
  2. Step 2: Convert to fraction form
    128,512.17/177,336.95 = 71,915.85/x
  3. Step 3: Cross multiply
    128,512.17x = 177,336.95 × 71,915.85
  4. Step 4: Simplify right side
    128,512.17x = 12,753,337,136.08
  5. Step 5: Solve for x
    x = 12,753,337,136.08/128,512.17
  6. Step 6: Final answer
    x = 99,238.36

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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.