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Finding the Fourth Proportional to 76,197.90, 114,037.65 and 66,866.70

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Solution

The fourth proportional to 76,197.90, 114,037.65 and 66,866.70 is: 100,072.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,197.90 : 114,037.65 = 66,866.70 : x
  2. Step 2: Convert to fraction form
    76,197.90/114,037.65 = 66,866.70/x
  3. Step 3: Cross multiply
    76,197.90x = 114,037.65 × 66,866.70
  4. Step 4: Simplify right side
    76,197.90x = 7,625,321,331.26
  5. Step 5: Solve for x
    x = 7,625,321,331.26/76,197.90
  6. Step 6: Final answer
    x = 100,072.59

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1.5x scale

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.