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Finding the Fourth Proportional to 92,899.89, 139,113.15 and 61,213.90

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Solution

The fourth proportional to 92,899.89, 139,113.15 and 61,213.90 is: 91,664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,899.89 : 139,113.15 = 61,213.90 : x
  2. Step 2: Convert to fraction form
    92,899.89/139,113.15 = 61,213.90/x
  3. Step 3: Cross multiply
    92,899.89x = 139,113.15 × 61,213.90
  4. Step 4: Simplify right side
    92,899.89x = 8,515,658,452.79
  5. Step 5: Solve for x
    x = 8,515,658,452.79/92,899.89
  6. Step 6: Final answer
    x = 91,664.89

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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.