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Finding the Fourth Proportional to 66,400,643.80, 99,600,965.70 and 52,530,033.70

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Solution

The fourth proportional to 66,400,643.80, 99,600,965.70 and 52,530,033.70 is: 78,795,050.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400,643.80 : 99,600,965.70 = 52,530,033.70 : x
  2. Step 2: Convert to fraction form
    66,400,643.80/99,600,965.70 = 52,530,033.70/x
  3. Step 3: Cross multiply
    66,400,643.80x = 99,600,965.70 × 52,530,033.70
  4. Step 4: Simplify right side
    66,400,643.80x = 5,232,042,084,773,545
  5. Step 5: Solve for x
    x = 5,232,042,084,773,545/66,400,643.80
  6. Step 6: Final answer
    x = 78,795,050.55

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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.