Home / 154,092.78-212,643.23-90,429.21

Finding the Fourth Proportional to 154,092.78, 212,643.23 and 90,429.21

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Solution

The fourth proportional to 154,092.78, 212,643.23 and 90,429.21 is: 124,789.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,092.78 : 212,643.23 = 90,429.21 : x
  2. Step 2: Convert to fraction form
    154,092.78/212,643.23 = 90,429.21/x
  3. Step 3: Cross multiply
    154,092.78x = 212,643.23 × 90,429.21
  4. Step 4: Simplify right side
    154,092.78x = 19,229,158,848.60
  5. Step 5: Solve for x
    x = 19,229,158,848.60/154,092.78
  6. Step 6: Final answer
    x = 124,789.49

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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.