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Finding the Fourth Proportional to 66,488.94, 91,761.80 and 40,662.59

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Solution

The fourth proportional to 66,488.94, 91,761.80 and 40,662.59 is: 56,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.94 : 91,761.80 = 40,662.59 : x
  2. Step 2: Convert to fraction form
    66,488.94/91,761.80 = 40,662.59/x
  3. Step 3: Cross multiply
    66,488.94x = 91,761.80 × 40,662.59
  4. Step 4: Simplify right side
    66,488.94x = 3,731,271,788.94
  5. Step 5: Solve for x
    x = 3,731,271,788.94/66,488.94
  6. Step 6: Final answer
    x = 56,118.68

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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.