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Finding the Fourth Proportional to 66,134.80, 99,202.20 and 45,139.60

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Solution

The fourth proportional to 66,134.80, 99,202.20 and 45,139.60 is: 67,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,134.80 : 99,202.20 = 45,139.60 : x
  2. Step 2: Convert to fraction form
    66,134.80/99,202.20 = 45,139.60/x
  3. Step 3: Cross multiply
    66,134.80x = 99,202.20 × 45,139.60
  4. Step 4: Simplify right side
    66,134.80x = 4,477,947,627.12
  5. Step 5: Solve for x
    x = 4,477,947,627.12/66,134.80
  6. Step 6: Final answer
    x = 67,709.40

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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.