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Finding the Fourth Proportional to 68,961,861.40, 103,428,276.90 and 34,851,141.40

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Solution

The fourth proportional to 68,961,861.40, 103,428,276.90 and 34,851,141.40 is: 52,269,376.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,961,861.40 : 103,428,276.90 = 34,851,141.40 : x
  2. Step 2: Convert to fraction form
    68,961,861.40/103,428,276.90 = 34,851,141.40/x
  3. Step 3: Cross multiply
    68,961,861.40x = 103,428,276.90 × 34,851,141.40
  4. Step 4: Simplify right side
    68,961,861.40x = 3,604,593,503,000,253.50
  5. Step 5: Solve for x
    x = 3,604,593,503,000,253.50/68,961,861.40
  6. Step 6: Final answer
    x = 52,269,376.58

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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.