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Finding the Fourth Proportional to 154,172.63, 212,793.78 and 100,363.93

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Solution

The fourth proportional to 154,172.63, 212,793.78 and 100,363.93 is: 138,525.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,172.63 : 212,793.78 = 100,363.93 : x
  2. Step 2: Convert to fraction form
    154,172.63/212,793.78 = 100,363.93/x
  3. Step 3: Cross multiply
    154,172.63x = 212,793.78 × 100,363.93
  4. Step 4: Simplify right side
    154,172.63x = 21,356,819,884.74
  5. Step 5: Solve for x
    x = 21,356,819,884.74/154,172.63
  6. Step 6: Final answer
    x = 138,525.36

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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.