Home / 154,639.54-213,398.92-90,981.42

Finding the Fourth Proportional to 154,639.54, 213,398.92 and 90,981.42

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Solution

The fourth proportional to 154,639.54, 213,398.92 and 90,981.42 is: 125,552.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,639.54 : 213,398.92 = 90,981.42 : x
  2. Step 2: Convert to fraction form
    154,639.54/213,398.92 = 90,981.42/x
  3. Step 3: Cross multiply
    154,639.54x = 213,398.92 × 90,981.42
  4. Step 4: Simplify right side
    154,639.54x = 19,415,336,768.07
  5. Step 5: Solve for x
    x = 19,415,336,768.07/154,639.54
  6. Step 6: Final answer
    x = 125,552.21

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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.