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Finding the Fourth Proportional to 61,764.78, 85,242.95 and 40,277.51

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Solution

The fourth proportional to 61,764.78, 85,242.95 and 40,277.51 is: 55,587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,764.78 : 85,242.95 = 40,277.51 : x
  2. Step 2: Convert to fraction form
    61,764.78/85,242.95 = 40,277.51/x
  3. Step 3: Cross multiply
    61,764.78x = 85,242.95 × 40,277.51
  4. Step 4: Simplify right side
    61,764.78x = 3,433,373,771.05
  5. Step 5: Solve for x
    x = 3,433,373,771.05/61,764.78
  6. Step 6: Final answer
    x = 55,587.89

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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.