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Finding the Fourth Proportional to 61,164,963.60, 91,747,445.40 and 20,775,447.60

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Solution

The fourth proportional to 61,164,963.60, 91,747,445.40 and 20,775,447.60 is: 31,163,171.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,164,963.60 : 91,747,445.40 = 20,775,447.60 : x
  2. Step 2: Convert to fraction form
    61,164,963.60/91,747,445.40 = 20,775,447.60/x
  3. Step 3: Cross multiply
    61,164,963.60x = 91,747,445.40 × 20,775,447.60
  4. Step 4: Simplify right side
    61,164,963.60x = 1,906,094,244,341,561.25
  5. Step 5: Solve for x
    x = 1,906,094,244,341,561.25/61,164,963.60
  6. Step 6: Final answer
    x = 31,163,171.40

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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.