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Finding the Fourth Proportional to 61,937.85, 85,509.71 and 40,778.63

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Solution

The fourth proportional to 61,937.85, 85,509.71 and 40,778.63 is: 56,297.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,937.85 : 85,509.71 = 40,778.63 : x
  2. Step 2: Convert to fraction form
    61,937.85/85,509.71 = 40,778.63/x
  3. Step 3: Cross multiply
    61,937.85x = 85,509.71 × 40,778.63
  4. Step 4: Simplify right side
    61,937.85x = 3,486,968,194.06
  5. Step 5: Solve for x
    x = 3,486,968,194.06/61,937.85
  6. Step 6: Final answer
    x = 56,297.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.