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Finding the Fourth Proportional to 68,901,892.80, 103,352,839.20 and 48,494,558.40

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Solution

The fourth proportional to 68,901,892.80, 103,352,839.20 and 48,494,558.40 is: 72,741,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,901,892.80 : 103,352,839.20 = 48,494,558.40 : x
  2. Step 2: Convert to fraction form
    68,901,892.80/103,352,839.20 = 48,494,558.40/x
  3. Step 3: Cross multiply
    68,901,892.80x = 103,352,839.20 × 48,494,558.40
  4. Step 4: Simplify right side
    68,901,892.80x = 5,012,050,296,390,209
  5. Step 5: Solve for x
    x = 5,012,050,296,390,209/68,901,892.80
  6. Step 6: Final answer
    x = 72,741,837.60

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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.