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Finding the Fourth Proportional to 128,067.70, 176,732.60 and 70,710.59

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Solution

The fourth proportional to 128,067.70, 176,732.60 and 70,710.59 is: 97,580.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,067.70 : 176,732.60 = 70,710.59 : x
  2. Step 2: Convert to fraction form
    128,067.70/176,732.60 = 70,710.59/x
  3. Step 3: Cross multiply
    128,067.70x = 176,732.60 × 70,710.59
  4. Step 4: Simplify right side
    128,067.70x = 12,496,866,506.51
  5. Step 5: Solve for x
    x = 12,496,866,506.51/128,067.70
  6. Step 6: Final answer
    x = 97,580.16

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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.