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Finding the Fourth Proportional to 61,618.93, 85,019.32 and 36,122.15

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Solution

The fourth proportional to 61,618.93, 85,019.32 and 36,122.15 is: 49,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,618.93 : 85,019.32 = 36,122.15 : x
  2. Step 2: Convert to fraction form
    61,618.93/85,019.32 = 36,122.15/x
  3. Step 3: Cross multiply
    61,618.93x = 85,019.32 × 36,122.15
  4. Step 4: Simplify right side
    61,618.93x = 3,071,080,887.64
  5. Step 5: Solve for x
    x = 3,071,080,887.64/61,618.93
  6. Step 6: Final answer
    x = 49,839.90

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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.