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Finding the Fourth Proportional to 112,800.68, 155,712.96 and 76,014.96

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Solution

The fourth proportional to 112,800.68, 155,712.96 and 76,014.96 is: 104,933.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,800.68 : 155,712.96 = 76,014.96 : x
  2. Step 2: Convert to fraction form
    112,800.68/155,712.96 = 76,014.96/x
  3. Step 3: Cross multiply
    112,800.68x = 155,712.96 × 76,014.96
  4. Step 4: Simplify right side
    112,800.68x = 11,836,513,628.17
  5. Step 5: Solve for x
    x = 11,836,513,628.17/112,800.68
  6. Step 6: Final answer
    x = 104,933.00

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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.