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Finding the Fourth Proportional to 66,373.09, 91,590.41 and 40,880.90

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Solution

The fourth proportional to 66,373.09, 91,590.41 and 40,880.90 is: 56,412.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,373.09 : 91,590.41 = 40,880.90 : x
  2. Step 2: Convert to fraction form
    66,373.09/91,590.41 = 40,880.90/x
  3. Step 3: Cross multiply
    66,373.09x = 91,590.41 × 40,880.90
  4. Step 4: Simplify right side
    66,373.09x = 3,744,298,723.35
  5. Step 5: Solve for x
    x = 3,744,298,723.35/66,373.09
  6. Step 6: Final answer
    x = 56,412.91

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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.