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Finding the Fourth Proportional to 66,440,420.60, 99,660,630.90 and 42,100,422.80

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Solution

The fourth proportional to 66,440,420.60, 99,660,630.90 and 42,100,422.80 is: 63,150,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440,420.60 : 99,660,630.90 = 42,100,422.80 : x
  2. Step 2: Convert to fraction form
    66,440,420.60/99,660,630.90 = 42,100,422.80/x
  3. Step 3: Cross multiply
    66,440,420.60x = 99,660,630.90 × 42,100,422.80
  4. Step 4: Simplify right side
    66,440,420.60x = 4,195,754,697,404,744.50
  5. Step 5: Solve for x
    x = 4,195,754,697,404,744.50/66,440,420.60
  6. Step 6: Final answer
    x = 63,150,634.20

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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.