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Finding the Fourth Proportional to 61,675.88, 85,128.66 and 40,219.11

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Solution

The fourth proportional to 61,675.88, 85,128.66 and 40,219.11 is: 55,512.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,675.88 : 85,128.66 = 40,219.11 : x
  2. Step 2: Convert to fraction form
    61,675.88/85,128.66 = 40,219.11/x
  3. Step 3: Cross multiply
    61,675.88x = 85,128.66 × 40,219.11
  4. Step 4: Simplify right side
    61,675.88x = 3,423,798,940.69
  5. Step 5: Solve for x
    x = 3,423,798,940.69/61,675.88
  6. Step 6: Final answer
    x = 55,512.77

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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.