Home / 66,420,658.20-99,630,987.30-40,778,520.60

Finding the Fourth Proportional to 66,420,658.20, 99,630,987.30 and 40,778,520.60

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Solution

The fourth proportional to 66,420,658.20, 99,630,987.30 and 40,778,520.60 is: 61,167,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,420,658.20 : 99,630,987.30 = 40,778,520.60 : x
  2. Step 2: Convert to fraction form
    66,420,658.20/99,630,987.30 = 40,778,520.60/x
  3. Step 3: Cross multiply
    66,420,658.20x = 99,630,987.30 × 40,778,520.60
  4. Step 4: Simplify right side
    66,420,658.20x = 4,062,804,268,011,388.50
  5. Step 5: Solve for x
    x = 4,062,804,268,011,388.50/66,420,658.20
  6. Step 6: Final answer
    x = 61,167,780.90

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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.