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Finding the Fourth Proportional to 100,608,993.70, 150,913,490.55 and 80,453,601.70

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Solution

The fourth proportional to 100,608,993.70, 150,913,490.55 and 80,453,601.70 is: 120,680,402.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608,993.70 : 150,913,490.55 = 80,453,601.70 : x
  2. Step 2: Convert to fraction form
    100,608,993.70/150,913,490.55 = 80,453,601.70/x
  3. Step 3: Cross multiply
    100,608,993.70x = 150,913,490.55 × 80,453,601.70
  4. Step 4: Simplify right side
    100,608,993.70x = 12,141,533,859,866,416
  5. Step 5: Solve for x
    x = 12,141,533,859,866,416/100,608,993.70
  6. Step 6: Final answer
    x = 120,680,402.55

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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.