Home / 154,644.25-213,409.47-90,151.78

Finding the Fourth Proportional to 154,644.25, 213,409.47 and 90,151.78

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Solution

The fourth proportional to 154,644.25, 213,409.47 and 90,151.78 is: 124,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,644.25 : 213,409.47 = 90,151.78 : x
  2. Step 2: Convert to fraction form
    154,644.25/213,409.47 = 90,151.78/x
  3. Step 3: Cross multiply
    154,644.25x = 213,409.47 × 90,151.78
  4. Step 4: Simplify right side
    154,644.25x = 19,239,243,589.36
  5. Step 5: Solve for x
    x = 19,239,243,589.36/154,644.25
  6. Step 6: Final answer
    x = 124,409.69

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1.5x scale

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.