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Finding the Fourth Proportional to 74,355.92, 102,608.88 and 40,362.80

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Solution

The fourth proportional to 74,355.92, 102,608.88 and 40,362.80 is: 55,699.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,355.92 : 102,608.88 = 40,362.80 : x
  2. Step 2: Convert to fraction form
    74,355.92/102,608.88 = 40,362.80/x
  3. Step 3: Cross multiply
    74,355.92x = 102,608.88 × 40,362.80
  4. Step 4: Simplify right side
    74,355.92x = 4,141,581,701.66
  5. Step 5: Solve for x
    x = 4,141,581,701.66/74,355.92
  6. Step 6: Final answer
    x = 55,699.42

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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.