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Finding the Fourth Proportional to 81,607,943.60, 122,411,915.40 and 30,483,319.40

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Solution

The fourth proportional to 81,607,943.60, 122,411,915.40 and 30,483,319.40 is: 45,724,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607,943.60 : 122,411,915.40 = 30,483,319.40 : x
  2. Step 2: Convert to fraction form
    81,607,943.60/122,411,915.40 = 30,483,319.40/x
  3. Step 3: Cross multiply
    81,607,943.60x = 122,411,915.40 × 30,483,319.40
  4. Step 4: Simplify right side
    81,607,943.60x = 3,731,521,515,503,979
  5. Step 5: Solve for x
    x = 3,731,521,515,503,979/81,607,943.60
  6. Step 6: Final answer
    x = 45,724,979.10

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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.