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Finding the Fourth Proportional to 99,856,272.80, 149,784,409.20 and 61,393,066.40

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Solution

The fourth proportional to 99,856,272.80, 149,784,409.20 and 61,393,066.40 is: 92,089,599.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,856,272.80 : 149,784,409.20 = 61,393,066.40 : x
  2. Step 2: Convert to fraction form
    99,856,272.80/149,784,409.20 = 61,393,066.40/x
  3. Step 3: Cross multiply
    99,856,272.80x = 149,784,409.20 × 61,393,066.40
  4. Step 4: Simplify right side
    99,856,272.80x = 9,195,724,179,700,370
  5. Step 5: Solve for x
    x = 9,195,724,179,700,370/99,856,272.80
  6. Step 6: Final answer
    x = 92,089,599.60

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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.