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Finding the Fourth Proportional to 127,658.40, 191,516.03 and 38,918.82

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Solution

The fourth proportional to 127,658.40, 191,516.03 and 38,918.82 is: 58,386.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,658.40 : 191,516.03 = 38,918.82 : x
  2. Step 2: Convert to fraction form
    127,658.40/191,516.03 = 38,918.82/x
  3. Step 3: Cross multiply
    127,658.40x = 191,516.03 × 38,918.82
  4. Step 4: Simplify right side
    127,658.40x = 7,453,577,898.68
  5. Step 5: Solve for x
    x = 7,453,577,898.68/127,658.40
  6. Step 6: Final answer
    x = 58,386.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.