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Finding the Fourth Proportional to 154,963.49, 213,607.01 and 101,221.61

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Solution

The fourth proportional to 154,963.49, 213,607.01 and 101,221.61 is: 139,527.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,963.49 : 213,607.01 = 101,221.61 : x
  2. Step 2: Convert to fraction form
    154,963.49/213,607.01 = 101,221.61/x
  3. Step 3: Cross multiply
    154,963.49x = 213,607.01 × 101,221.61
  4. Step 4: Simplify right side
    154,963.49x = 21,621,644,953.38
  5. Step 5: Solve for x
    x = 21,621,644,953.38/154,963.49
  6. Step 6: Final answer
    x = 139,527.35

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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.