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Finding the Fourth Proportional to 66,685,348.60, 99,972,035.70 and 34,772,644.60

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Solution

The fourth proportional to 66,685,348.60, 99,972,035.70 and 34,772,644.60 is: 52,129,772.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,685,348.60 : 99,972,035.70 = 34,772,644.60 : x
  2. Step 2: Convert to fraction form
    66,685,348.60/99,972,035.70 = 34,772,644.60/x
  3. Step 3: Cross multiply
    66,685,348.60x = 99,972,035.70 × 34,772,644.60
  4. Step 4: Simplify right side
    66,685,348.60x = 3,476,292,067,334,612.50
  5. Step 5: Solve for x
    x = 3,476,292,067,334,612.50/66,685,348.60
  6. Step 6: Final answer
    x = 52,129,772.74

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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.