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Finding the Fourth Proportional to 79,359,906.80, 118,892,893.80 and 45,179,721.20

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Solution

The fourth proportional to 79,359,906.80, 118,892,893.80 and 45,179,721.20 is: 67,685,913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,359,906.80 : 118,892,893.80 = 45,179,721.20 : x
  2. Step 2: Convert to fraction form
    79,359,906.80/118,892,893.80 = 45,179,721.20/x
  3. Step 3: Cross multiply
    79,359,906.80x = 118,892,893.80 × 45,179,721.20
  4. Step 4: Simplify right side
    79,359,906.80x = 5,371,547,794,545,209
  5. Step 5: Solve for x
    x = 5,371,547,794,545,209/79,359,906.80
  6. Step 6: Final answer
    x = 67,685,913.59

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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.