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Finding the Fourth Proportional to 153,758.84, 212,208.27 and 90,122

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Solution

The fourth proportional to 153,758.84, 212,208.27 and 90,122 is: 124,380.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,758.84 : 212,208.27 = 90,122 : x
  2. Step 2: Convert to fraction form
    153,758.84/212,208.27 = 90,122/x
  3. Step 3: Cross multiply
    153,758.84x = 212,208.27 × 90,122
  4. Step 4: Simplify right side
    153,758.84x = 19,124,633,708.94
  5. Step 5: Solve for x
    x = 19,124,633,708.94/153,758.84
  6. Step 6: Final answer
    x = 124,380.71

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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.