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Finding the Fourth Proportional to 66,488.28, 91,741.27 and 39,633.29

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Solution

The fourth proportional to 66,488.28, 91,741.27 and 39,633.29 is: 54,686.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.28 : 91,741.27 = 39,633.29 : x
  2. Step 2: Convert to fraction form
    66,488.28/91,741.27 = 39,633.29/x
  3. Step 3: Cross multiply
    66,488.28x = 91,741.27 × 39,633.29
  4. Step 4: Simplify right side
    66,488.28x = 3,636,008,358.88
  5. Step 5: Solve for x
    x = 3,636,008,358.88/66,488.28
  6. Step 6: Final answer
    x = 54,686.46

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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.