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Finding the Fourth Proportional to 66,257,360.80, 99,389,410.80 and 20,819,600.80

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Solution

The fourth proportional to 66,257,360.80, 99,389,410.80 and 20,819,600.80 is: 31,230,460.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,257,360.80 : 99,389,410.80 = 20,819,600.80 : x
  2. Step 2: Convert to fraction form
    66,257,360.80/99,389,410.80 = 20,819,600.80/x
  3. Step 3: Cross multiply
    66,257,360.80x = 99,389,410.80 × 20,819,600.80
  4. Step 4: Simplify right side
    66,257,360.80x = 2,069,247,856,603,208.75
  5. Step 5: Solve for x
    x = 2,069,247,856,603,208.75/66,257,360.80
  6. Step 6: Final answer
    x = 31,230,460.01

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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.