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Finding the Fourth Proportional to 128,052.83, 176,713.56 and 70,691.12

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Solution

The fourth proportional to 128,052.83, 176,713.56 and 70,691.12 is: 97,554.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.83 : 176,713.56 = 70,691.12 : x
  2. Step 2: Convert to fraction form
    128,052.83/176,713.56 = 70,691.12/x
  3. Step 3: Cross multiply
    128,052.83x = 176,713.56 × 70,691.12
  4. Step 4: Simplify right side
    128,052.83x = 12,492,079,475.59
  5. Step 5: Solve for x
    x = 12,492,079,475.59/128,052.83
  6. Step 6: Final answer
    x = 97,554.11

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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.