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Finding the Fourth Proportional to 61,690.77, 85,146.75 and 39,059.94

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Solution

The fourth proportional to 61,690.77, 85,146.75 and 39,059.94 is: 53,911.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,690.77 : 85,146.75 = 39,059.94 : x
  2. Step 2: Convert to fraction form
    61,690.77/85,146.75 = 39,059.94/x
  3. Step 3: Cross multiply
    61,690.77x = 85,146.75 × 39,059.94
  4. Step 4: Simplify right side
    61,690.77x = 3,325,826,946.20
  5. Step 5: Solve for x
    x = 3,325,826,946.20/61,690.77
  6. Step 6: Final answer
    x = 53,911.26

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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.