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Finding the Fourth Proportional to 74,492.68, 102,791.28 and 42,659.68

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Solution

The fourth proportional to 74,492.68, 102,791.28 and 42,659.68 is: 58,865.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,492.68 : 102,791.28 = 42,659.68 : x
  2. Step 2: Convert to fraction form
    74,492.68/102,791.28 = 42,659.68/x
  3. Step 3: Cross multiply
    74,492.68x = 102,791.28 × 42,659.68
  4. Step 4: Simplify right side
    74,492.68x = 4,385,043,111.59
  5. Step 5: Solve for x
    x = 4,385,043,111.59/74,492.68
  6. Step 6: Final answer
    x = 58,865.42

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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.