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Finding the Fourth Proportional to 66,525.20, 99,672.60 and 43,139.60

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Solution

The fourth proportional to 66,525.20, 99,672.60 and 43,139.60 is: 64,634.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,525.20 : 99,672.60 = 43,139.60 : x
  2. Step 2: Convert to fraction form
    66,525.20/99,672.60 = 43,139.60/x
  3. Step 3: Cross multiply
    66,525.20x = 99,672.60 × 43,139.60
  4. Step 4: Simplify right side
    66,525.20x = 4,299,836,094.96
  5. Step 5: Solve for x
    x = 4,299,836,094.96/66,525.20
  6. Step 6: Final answer
    x = 64,634.70

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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.