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Finding the Fourth Proportional to 61,690.16, 85,127.28 and 36,193.86

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Solution

The fourth proportional to 61,690.16, 85,127.28 and 36,193.86 is: 49,944.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,690.16 : 85,127.28 = 36,193.86 : x
  2. Step 2: Convert to fraction form
    61,690.16/85,127.28 = 36,193.86/x
  3. Step 3: Cross multiply
    61,690.16x = 85,127.28 × 36,193.86
  4. Step 4: Simplify right side
    61,690.16x = 3,081,084,854.50
  5. Step 5: Solve for x
    x = 3,081,084,854.50/61,690.16
  6. Step 6: Final answer
    x = 49,944.51

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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.