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Finding the Fourth Proportional to 9,980,137.20, 14,970,205.80 and 8,970,399.30

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Solution

The fourth proportional to 9,980,137.20, 14,970,205.80 and 8,970,399.30 is: 13,455,598.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980,137.20 : 14,970,205.80 = 8,970,399.30 : x
  2. Step 2: Convert to fraction form
    9,980,137.20/14,970,205.80 = 8,970,399.30/x
  3. Step 3: Cross multiply
    9,980,137.20x = 14,970,205.80 × 8,970,399.30
  4. Step 4: Simplify right side
    9,980,137.20x = 134,288,723,629,175.95
  5. Step 5: Solve for x
    x = 134,288,723,629,175.95/9,980,137.20
  6. Step 6: Final answer
    x = 13,455,598.95

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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.