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Finding the Fourth Proportional to 129,115,428.30, 193,673,142.45 and 129,115,428.30

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Solution

The fourth proportional to 129,115,428.30, 193,673,142.45 and 129,115,428.30 is: 193,673,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,115,428.30 : 193,673,142.45 = 129,115,428.30 : x
  2. Step 2: Convert to fraction form
    129,115,428.30/193,673,142.45 = 129,115,428.30/x
  3. Step 3: Cross multiply
    129,115,428.30x = 193,673,142.45 × 129,115,428.30
  4. Step 4: Simplify right side
    129,115,428.30x = 25,006,190,737,638,660
  5. Step 5: Solve for x
    x = 25,006,190,737,638,660/129,115,428.30
  6. Step 6: Final answer
    x = 193,673,142.45

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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.