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Finding the Fourth Proportional to 74,805.09, 103,235.01 and 42,976.05

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Solution

The fourth proportional to 74,805.09, 103,235.01 and 42,976.05 is: 59,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,805.09 : 103,235.01 = 42,976.05 : x
  2. Step 2: Convert to fraction form
    74,805.09/103,235.01 = 42,976.05/x
  3. Step 3: Cross multiply
    74,805.09x = 103,235.01 × 42,976.05
  4. Step 4: Simplify right side
    74,805.09x = 4,436,632,951.51
  5. Step 5: Solve for x
    x = 4,436,632,951.51/74,805.09
  6. Step 6: Final answer
    x = 59,309.24

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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.