Home / 78,789.77-118,185.09-19,625.45

Finding the Fourth Proportional to 78,789.77, 118,185.09 and 19,625.45

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Solution

The fourth proportional to 78,789.77, 118,185.09 and 19,625.45 is: 29,438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,789.77 : 118,185.09 = 19,625.45 : x
  2. Step 2: Convert to fraction form
    78,789.77/118,185.09 = 19,625.45/x
  3. Step 3: Cross multiply
    78,789.77x = 118,185.09 × 19,625.45
  4. Step 4: Simplify right side
    78,789.77x = 2,319,434,983.62
  5. Step 5: Solve for x
    x = 2,319,434,983.62/78,789.77
  6. Step 6: Final answer
    x = 29,438.28

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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.