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Finding the Fourth Proportional to 90,570.97, 135,879.52 and 40,669.94

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Solution

The fourth proportional to 90,570.97, 135,879.52 and 40,669.94 is: 61,015.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,570.97 : 135,879.52 = 40,669.94 : x
  2. Step 2: Convert to fraction form
    90,570.97/135,879.52 = 40,669.94/x
  3. Step 3: Cross multiply
    90,570.97x = 135,879.52 × 40,669.94
  4. Step 4: Simplify right side
    90,570.97x = 5,526,211,925.63
  5. Step 5: Solve for x
    x = 5,526,211,925.63/90,570.97
  6. Step 6: Final answer
    x = 61,015.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.