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Finding the Fourth Proportional to 74,860.66, 103,309.59 and 42,593.50

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Solution

The fourth proportional to 74,860.66, 103,309.59 and 42,593.50 is: 58,780.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,860.66 : 103,309.59 = 42,593.50 : x
  2. Step 2: Convert to fraction form
    74,860.66/103,309.59 = 42,593.50/x
  3. Step 3: Cross multiply
    74,860.66x = 103,309.59 × 42,593.50
  4. Step 4: Simplify right side
    74,860.66x = 4,400,317,021.67
  5. Step 5: Solve for x
    x = 4,400,317,021.67/74,860.66
  6. Step 6: Final answer
    x = 58,780.10

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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.