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Finding the Fourth Proportional to 266,936,806.60, 400,405,209.90 and 85,202,355.40

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Solution

The fourth proportional to 266,936,806.60, 400,405,209.90 and 85,202,355.40 is: 127,803,533.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,936,806.60 : 400,405,209.90 = 85,202,355.40 : x
  2. Step 2: Convert to fraction form
    266,936,806.60/400,405,209.90 = 85,202,355.40/x
  3. Step 3: Cross multiply
    266,936,806.60x = 400,405,209.90 × 85,202,355.40
  4. Step 4: Simplify right side
    266,936,806.60x = 34,115,466,997,911,400
  5. Step 5: Solve for x
    x = 34,115,466,997,911,400/266,936,806.60
  6. Step 6: Final answer
    x = 127,803,533.10

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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.