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Finding the Fourth Proportional to 66,070.46, 99,120.82 and 28,636.82

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Solution

The fourth proportional to 66,070.46, 99,120.82 and 28,636.82 is: 42,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,070.46 : 99,120.82 = 28,636.82 : x
  2. Step 2: Convert to fraction form
    66,070.46/99,120.82 = 28,636.82/x
  3. Step 3: Cross multiply
    66,070.46x = 99,120.82 × 28,636.82
  4. Step 4: Simplify right side
    66,070.46x = 2,838,505,080.59
  5. Step 5: Solve for x
    x = 2,838,505,080.59/66,070.46
  6. Step 6: Final answer
    x = 42,961.79

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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.