Home / 212,918.60-319,256.40-79,803.20

Finding the Fourth Proportional to 212,918.60, 319,256.40 and 79,803.20

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Solution

The fourth proportional to 212,918.60, 319,256.40 and 79,803.20 is: 119,659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,918.60 : 319,256.40 = 79,803.20 : x
  2. Step 2: Convert to fraction form
    212,918.60/319,256.40 = 79,803.20/x
  3. Step 3: Cross multiply
    212,918.60x = 319,256.40 × 79,803.20
  4. Step 4: Simplify right side
    212,918.60x = 25,477,682,340.48
  5. Step 5: Solve for x
    x = 25,477,682,340.48/212,918.60
  6. Step 6: Final answer
    x = 119,659.26

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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.