Home / 78,782.09-118,142.28-27,477.79

Finding the Fourth Proportional to 78,782.09, 118,142.28 and 27,477.79

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Solution

The fourth proportional to 78,782.09, 118,142.28 and 27,477.79 is: 41,205.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,782.09 : 118,142.28 = 27,477.79 : x
  2. Step 2: Convert to fraction form
    78,782.09/118,142.28 = 27,477.79/x
  3. Step 3: Cross multiply
    78,782.09x = 118,142.28 × 27,477.79
  4. Step 4: Simplify right side
    78,782.09x = 3,246,288,464.61
  5. Step 5: Solve for x
    x = 3,246,288,464.61/78,782.09
  6. Step 6: Final answer
    x = 41,205.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.