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Finding the Fourth Proportional to 154,551.93, 213,252.80 and 90,866.49

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Solution

The fourth proportional to 154,551.93, 213,252.80 and 90,866.49 is: 125,378.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,551.93 : 213,252.80 = 90,866.49 : x
  2. Step 2: Convert to fraction form
    154,551.93/213,252.80 = 90,866.49/x
  3. Step 3: Cross multiply
    154,551.93x = 213,252.80 × 90,866.49
  4. Step 4: Simplify right side
    154,551.93x = 19,377,532,964.34
  5. Step 5: Solve for x
    x = 19,377,532,964.34/154,551.93
  6. Step 6: Final answer
    x = 125,378.78

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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.