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Finding the Fourth Proportional to 154,353.87, 212,940.72 and 90,662.94

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Solution

The fourth proportional to 154,353.87, 212,940.72 and 90,662.94 is: 125,075.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,353.87 : 212,940.72 = 90,662.94 : x
  2. Step 2: Convert to fraction form
    154,353.87/212,940.72 = 90,662.94/x
  3. Step 3: Cross multiply
    154,353.87x = 212,940.72 × 90,662.94
  4. Step 4: Simplify right side
    154,353.87x = 19,305,831,720.92
  5. Step 5: Solve for x
    x = 19,305,831,720.92/154,353.87
  6. Step 6: Final answer
    x = 125,075.14

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1.5x scale

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.