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Finding the Fourth Proportional to 66,495.28, 99,742.90 and 28,536.31

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Solution

The fourth proportional to 66,495.28, 99,742.90 and 28,536.31 is: 42,804.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,495.28 : 99,742.90 = 28,536.31 : x
  2. Step 2: Convert to fraction form
    66,495.28/99,742.90 = 28,536.31/x
  3. Step 3: Cross multiply
    66,495.28x = 99,742.90 × 28,536.31
  4. Step 4: Simplify right side
    66,495.28x = 2,846,294,314.70
  5. Step 5: Solve for x
    x = 2,846,294,314.70/66,495.28
  6. Step 6: Final answer
    x = 42,804.46

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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.