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Finding the Fourth Proportional to 100,608,995.20, 150,913,492.80 and 80,453,603.20

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Solution

The fourth proportional to 100,608,995.20, 150,913,492.80 and 80,453,603.20 is: 120,680,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608,995.20 : 150,913,492.80 = 80,453,603.20 : x
  2. Step 2: Convert to fraction form
    100,608,995.20/150,913,492.80 = 80,453,603.20/x
  3. Step 3: Cross multiply
    100,608,995.20x = 150,913,492.80 × 80,453,603.20
  4. Step 4: Simplify right side
    100,608,995.20x = 12,141,534,267,257,258
  5. Step 5: Solve for x
    x = 12,141,534,267,257,258/100,608,995.20
  6. Step 6: Final answer
    x = 120,680,404.80

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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.