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Finding the Fourth Proportional to 154,323.70, 212,920.05 and 90,625.30

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Solution

The fourth proportional to 154,323.70, 212,920.05 and 90,625.30 is: 125,035.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,323.70 : 212,920.05 = 90,625.30 : x
  2. Step 2: Convert to fraction form
    154,323.70/212,920.05 = 90,625.30/x
  3. Step 3: Cross multiply
    154,323.70x = 212,920.05 × 90,625.30
  4. Step 4: Simplify right side
    154,323.70x = 19,295,943,407.27
  5. Step 5: Solve for x
    x = 19,295,943,407.27/154,323.70
  6. Step 6: Final answer
    x = 125,035.52

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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.