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Finding the Fourth Proportional to 99,856,286.80, 149,784,430.20 and 61,393,080.40

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Solution

The fourth proportional to 99,856,286.80, 149,784,430.20 and 61,393,080.40 is: 92,089,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,856,286.80 : 149,784,430.20 = 61,393,080.40 : x
  2. Step 2: Convert to fraction form
    99,856,286.80/149,784,430.20 = 61,393,080.40/x
  3. Step 3: Cross multiply
    99,856,286.80x = 149,784,430.20 × 61,393,080.40
  4. Step 4: Simplify right side
    99,856,286.80x = 9,195,727,565,936,788
  5. Step 5: Solve for x
    x = 9,195,727,565,936,788/99,856,286.80
  6. Step 6: Final answer
    x = 92,089,620.60

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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.