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Finding the Fourth Proportional to 112,691.94, 155,525.31 and 62,390.94

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Solution

The fourth proportional to 112,691.94, 155,525.31 and 62,390.94 is: 86,105.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,691.94 : 155,525.31 = 62,390.94 : x
  2. Step 2: Convert to fraction form
    112,691.94/155,525.31 = 62,390.94/x
  3. Step 3: Cross multiply
    112,691.94x = 155,525.31 × 62,390.94
  4. Step 4: Simplify right side
    112,691.94x = 9,703,370,284.69
  5. Step 5: Solve for x
    x = 9,703,370,284.69/112,691.94
  6. Step 6: Final answer
    x = 86,105.27

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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.