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Finding the Fourth Proportional to 99,813,605.60, 149,720,408.40 and 85,200,946.40

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Solution

The fourth proportional to 99,813,605.60, 149,720,408.40 and 85,200,946.40 is: 127,801,419.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,813,605.60 : 149,720,408.40 = 85,200,946.40 : x
  2. Step 2: Convert to fraction form
    99,813,605.60/149,720,408.40 = 85,200,946.40/x
  3. Step 3: Cross multiply
    99,813,605.60x = 149,720,408.40 × 85,200,946.40
  4. Step 4: Simplify right side
    99,813,605.60x = 12,756,320,491,074,512
  5. Step 5: Solve for x
    x = 12,756,320,491,074,512/99,813,605.60
  6. Step 6: Final answer
    x = 127,801,419.60

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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.