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Finding the Fourth Proportional to 154,406.88, 212,912.28 and 100,592.10

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Solution

The fourth proportional to 154,406.88, 212,912.28 and 100,592.10 is: 138,706.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,406.88 : 212,912.28 = 100,592.10 : x
  2. Step 2: Convert to fraction form
    154,406.88/212,912.28 = 100,592.10/x
  3. Step 3: Cross multiply
    154,406.88x = 212,912.28 × 100,592.10
  4. Step 4: Simplify right side
    154,406.88x = 21,417,293,360.99
  5. Step 5: Solve for x
    x = 21,417,293,360.99/154,406.88
  6. Step 6: Final answer
    x = 138,706.86

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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.