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Finding the Fourth Proportional to 66,485.53, 99,636.82 and 28,489.32

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Solution

The fourth proportional to 66,485.53, 99,636.82 and 28,489.32 is: 42,694.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.53 : 99,636.82 = 28,489.32 : x
  2. Step 2: Convert to fraction form
    66,485.53/99,636.82 = 28,489.32/x
  3. Step 3: Cross multiply
    66,485.53x = 99,636.82 × 28,489.32
  4. Step 4: Simplify right side
    66,485.53x = 2,838,585,248.76
  5. Step 5: Solve for x
    x = 2,838,585,248.76/66,485.53
  6. Step 6: Final answer
    x = 42,694.78

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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.