Home / 78,939.29-118,406.22-19,775.48

Finding the Fourth Proportional to 78,939.29, 118,406.22 and 19,775.48

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Solution

The fourth proportional to 78,939.29, 118,406.22 and 19,775.48 is: 29,662.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.29 : 118,406.22 = 19,775.48 : x
  2. Step 2: Convert to fraction form
    78,939.29/118,406.22 = 19,775.48/x
  3. Step 3: Cross multiply
    78,939.29x = 118,406.22 × 19,775.48
  4. Step 4: Simplify right side
    78,939.29x = 2,341,539,835.49
  5. Step 5: Solve for x
    x = 2,341,539,835.49/78,939.29
  6. Step 6: Final answer
    x = 29,662.54

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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.