Home / 128,200.20-176,913.36-71,611.44

Finding the Fourth Proportional to 128,200.20, 176,913.36 and 71,611.44

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Solution

The fourth proportional to 128,200.20, 176,913.36 and 71,611.44 is: 98,822.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.20 : 176,913.36 = 71,611.44 : x
  2. Step 2: Convert to fraction form
    128,200.20/176,913.36 = 71,611.44/x
  3. Step 3: Cross multiply
    128,200.20x = 176,913.36 × 71,611.44
  4. Step 4: Simplify right side
    128,200.20x = 12,669,020,464.84
  5. Step 5: Solve for x
    x = 12,669,020,464.84/128,200.20
  6. Step 6: Final answer
    x = 98,822.16

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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.