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Finding the Fourth Proportional to 128,144.01, 176,838.03 and 70,787.28

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Solution

The fourth proportional to 128,144.01, 176,838.03 and 70,787.28 is: 97,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.01 : 176,838.03 = 70,787.28 : x
  2. Step 2: Convert to fraction form
    128,144.01/176,838.03 = 70,787.28/x
  3. Step 3: Cross multiply
    128,144.01x = 176,838.03 × 70,787.28
  4. Step 4: Simplify right side
    128,144.01x = 12,517,882,856.93
  5. Step 5: Solve for x
    x = 12,517,882,856.93/128,144.01
  6. Step 6: Final answer
    x = 97,686.05

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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.