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Finding the Fourth Proportional to 66,145.80, 99,144.90 and 28,662.60

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Solution

The fourth proportional to 66,145.80, 99,144.90 and 28,662.60 is: 42,961.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145.80 : 99,144.90 = 28,662.60 : x
  2. Step 2: Convert to fraction form
    66,145.80/99,144.90 = 28,662.60/x
  3. Step 3: Cross multiply
    66,145.80x = 99,144.90 × 28,662.60
  4. Step 4: Simplify right side
    66,145.80x = 2,841,750,610.74
  5. Step 5: Solve for x
    x = 2,841,750,610.74/66,145.80
  6. Step 6: Final answer
    x = 42,961.92

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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.