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Finding the Fourth Proportional to 66,358.20, 99,690.90 and 45,622.20

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Solution

The fourth proportional to 66,358.20, 99,690.90 and 45,622.20 is: 68,538.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,358.20 : 99,690.90 = 45,622.20 : x
  2. Step 2: Convert to fraction form
    66,358.20/99,690.90 = 45,622.20/x
  3. Step 3: Cross multiply
    66,358.20x = 99,690.90 × 45,622.20
  4. Step 4: Simplify right side
    66,358.20x = 4,548,118,177.98
  5. Step 5: Solve for x
    x = 4,548,118,177.98/66,358.20
  6. Step 6: Final answer
    x = 68,538.90

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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.