Home / 216,815.24-299,205.40-121,322

Finding the Fourth Proportional to 216,815.24, 299,205.40 and 121,322

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Solution

The fourth proportional to 216,815.24, 299,205.40 and 121,322 is: 167,424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,815.24 : 299,205.40 = 121,322 : x
  2. Step 2: Convert to fraction form
    216,815.24/299,205.40 = 121,322/x
  3. Step 3: Cross multiply
    216,815.24x = 299,205.40 × 121,322
  4. Step 4: Simplify right side
    216,815.24x = 36,300,197,538.80
  5. Step 5: Solve for x
    x = 36,300,197,538.80/216,815.24
  6. Step 6: Final answer
    x = 167,424.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.