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Finding the Fourth Proportional to 65,617,672.80, 98,426,509.20 and 31,530,799.20

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Solution

The fourth proportional to 65,617,672.80, 98,426,509.20 and 31,530,799.20 is: 47,296,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,617,672.80 : 98,426,509.20 = 31,530,799.20 : x
  2. Step 2: Convert to fraction form
    65,617,672.80/98,426,509.20 = 31,530,799.20/x
  3. Step 3: Cross multiply
    65,617,672.80x = 98,426,509.20 × 31,530,799.20
  4. Step 4: Simplify right side
    65,617,672.80x = 3,103,466,497,542,152.50
  5. Step 5: Solve for x
    x = 3,103,466,497,542,152.50/65,617,672.80
  6. Step 6: Final answer
    x = 47,296,198.80

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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.