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Finding the Fourth Proportional to 112,713, 155,543.94 and 62,412

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Solution

The fourth proportional to 112,713, 155,543.94 and 62,412 is: 86,128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,713 : 155,543.94 = 62,412 : x
  2. Step 2: Convert to fraction form
    112,713/155,543.94 = 62,412/x
  3. Step 3: Cross multiply
    112,713x = 155,543.94 × 62,412
  4. Step 4: Simplify right side
    112,713x = 9,707,808,383.28
  5. Step 5: Solve for x
    x = 9,707,808,383.28/112,713
  6. Step 6: Final answer
    x = 86,128.56

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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.