Home / 213,028.60-319,421.40-79,913.20

Finding the Fourth Proportional to 213,028.60, 319,421.40 and 79,913.20

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Solution

The fourth proportional to 213,028.60, 319,421.40 and 79,913.20 is: 119,824.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,028.60 : 319,421.40 = 79,913.20 : x
  2. Step 2: Convert to fraction form
    213,028.60/319,421.40 = 79,913.20/x
  3. Step 3: Cross multiply
    213,028.60x = 319,421.40 × 79,913.20
  4. Step 4: Simplify right side
    213,028.60x = 25,525,986,222.48
  5. Step 5: Solve for x
    x = 25,525,986,222.48/213,028.60
  6. Step 6: Final answer
    x = 119,824.22

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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.