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Finding the Fourth Proportional to 74,838.40, 103,294.74 and 43,025.80

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Solution

The fourth proportional to 74,838.40, 103,294.74 and 43,025.80 is: 59,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,838.40 : 103,294.74 = 43,025.80 : x
  2. Step 2: Convert to fraction form
    74,838.40/103,294.74 = 43,025.80/x
  3. Step 3: Cross multiply
    74,838.40x = 103,294.74 × 43,025.80
  4. Step 4: Simplify right side
    74,838.40x = 4,444,338,824.29
  5. Step 5: Solve for x
    x = 4,444,338,824.29/74,838.40
  6. Step 6: Final answer
    x = 59,385.81

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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.