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Finding the Fourth Proportional to 90,085,846.65, 135,128,769.98 and 90,085,846.65

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Solution

The fourth proportional to 90,085,846.65, 135,128,769.98 and 90,085,846.65 is: 135,128,769.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,085,846.65 : 135,128,769.98 = 90,085,846.65 : x
  2. Step 2: Convert to fraction form
    90,085,846.65/135,128,769.98 = 90,085,846.65/x
  3. Step 3: Cross multiply
    90,085,846.65x = 135,128,769.98 × 90,085,846.65
  4. Step 4: Simplify right side
    90,085,846.65x = 12,173,189,649,970,974
  5. Step 5: Solve for x
    x = 12,173,189,649,970,974/90,085,846.65
  6. Step 6: Final answer
    x = 135,128,769.98

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Double scale
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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.