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Finding the Fourth Proportional to 66,280.98, 91,405.08 and 42,366

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Solution

The fourth proportional to 66,280.98, 91,405.08 and 42,366 is: 58,425.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,280.98 : 91,405.08 = 42,366 : x
  2. Step 2: Convert to fraction form
    66,280.98/91,405.08 = 42,366/x
  3. Step 3: Cross multiply
    66,280.98x = 91,405.08 × 42,366
  4. Step 4: Simplify right side
    66,280.98x = 3,872,467,619.28
  5. Step 5: Solve for x
    x = 3,872,467,619.28/66,280.98
  6. Step 6: Final answer
    x = 58,425.02

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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.