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Finding the Fourth Proportional to 70,238.78, 96,928.04 and 38,407.65

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Solution

The fourth proportional to 70,238.78, 96,928.04 and 38,407.65 is: 53,001.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,238.78 : 96,928.04 = 38,407.65 : x
  2. Step 2: Convert to fraction form
    70,238.78/96,928.04 = 38,407.65/x
  3. Step 3: Cross multiply
    70,238.78x = 96,928.04 × 38,407.65
  4. Step 4: Simplify right side
    70,238.78x = 3,722,778,043.47
  5. Step 5: Solve for x
    x = 3,722,778,043.47/70,238.78
  6. Step 6: Final answer
    x = 53,001.75

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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.