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Finding the Fourth Proportional to 82,787,494.40, 124,181,241.60 and 81,443,801.60

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Solution

The fourth proportional to 82,787,494.40, 124,181,241.60 and 81,443,801.60 is: 122,165,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,787,494.40 : 124,181,241.60 = 81,443,801.60 : x
  2. Step 2: Convert to fraction form
    82,787,494.40/124,181,241.60 = 81,443,801.60/x
  3. Step 3: Cross multiply
    82,787,494.40x = 124,181,241.60 × 81,443,801.60
  4. Step 4: Simplify right side
    82,787,494.40x = 10,113,792,403,312,066
  5. Step 5: Solve for x
    x = 10,113,792,403,312,066/82,787,494.40
  6. Step 6: Final answer
    x = 122,165,702.40

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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.