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Finding the Fourth Proportional to 90,085,845.90, 135,128,768.85 and 90,085,845.90

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Solution

The fourth proportional to 90,085,845.90, 135,128,768.85 and 90,085,845.90 is: 135,128,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,085,845.90 : 135,128,768.85 = 90,085,845.90 : x
  2. Step 2: Convert to fraction form
    90,085,845.90/135,128,768.85 = 90,085,845.90/x
  3. Step 3: Cross multiply
    90,085,845.90x = 135,128,768.85 × 90,085,845.90
  4. Step 4: Simplify right side
    90,085,845.90x = 12,173,189,447,277,820
  5. Step 5: Solve for x
    x = 12,173,189,447,277,820/90,085,845.90
  6. Step 6: Final answer
    x = 135,128,768.85

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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.