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Finding the Fourth Proportional to 154,658.43, 213,418.53 and 90,983.93

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Solution

The fourth proportional to 154,658.43, 213,418.53 and 90,983.93 is: 125,551.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,658.43 : 213,418.53 = 90,983.93 : x
  2. Step 2: Convert to fraction form
    154,658.43/213,418.53 = 90,983.93/x
  3. Step 3: Cross multiply
    154,658.43x = 213,418.53 × 90,983.93
  4. Step 4: Simplify right side
    154,658.43x = 19,417,655,527.13
  5. Step 5: Solve for x
    x = 19,417,655,527.13/154,658.43
  6. Step 6: Final answer
    x = 125,551.87

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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.