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Finding the Fourth Proportional to 81,607,802.80, 122,411,704.20 and 80,851,975.60

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Solution

The fourth proportional to 81,607,802.80, 122,411,704.20 and 80,851,975.60 is: 121,277,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607,802.80 : 122,411,704.20 = 80,851,975.60 : x
  2. Step 2: Convert to fraction form
    81,607,802.80/122,411,704.20 = 80,851,975.60/x
  3. Step 3: Cross multiply
    81,607,802.80x = 122,411,704.20 × 80,851,975.60
  4. Step 4: Simplify right side
    81,607,802.80x = 9,897,228,121,132,818
  5. Step 5: Solve for x
    x = 9,897,228,121,132,818/81,607,802.80
  6. Step 6: Final answer
    x = 121,277,963.40

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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.