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Finding the Fourth Proportional to 61,317.54, 84,565.52 and 39,786.08

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Solution

The fourth proportional to 61,317.54, 84,565.52 and 39,786.08 is: 54,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,317.54 : 84,565.52 = 39,786.08 : x
  2. Step 2: Convert to fraction form
    61,317.54/84,565.52 = 39,786.08/x
  3. Step 3: Cross multiply
    61,317.54x = 84,565.52 × 39,786.08
  4. Step 4: Simplify right side
    61,317.54x = 3,364,529,922.20
  5. Step 5: Solve for x
    x = 3,364,529,922.20/61,317.54
  6. Step 6: Final answer
    x = 54,870.60

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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.