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Finding the Fourth Proportional to 61,930,820.90, 92,893,278.90 and 20,986,244.30

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Solution

The fourth proportional to 61,930,820.90, 92,893,278.90 and 20,986,244.30 is: 31,478,365.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,930,820.90 : 92,893,278.90 = 20,986,244.30 : x
  2. Step 2: Convert to fraction form
    61,930,820.90/92,893,278.90 = 20,986,244.30/x
  3. Step 3: Cross multiply
    61,930,820.90x = 92,893,278.90 × 20,986,244.30
  4. Step 4: Simplify right side
    61,930,820.90x = 1,949,481,044,823,435.50
  5. Step 5: Solve for x
    x = 1,949,481,044,823,435.50/61,930,820.90
  6. Step 6: Final answer
    x = 31,478,365.97

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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.