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Finding the Fourth Proportional to 154,225.44, 212,814 and 87,157.44

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Solution

The fourth proportional to 154,225.44, 212,814 and 87,157.44 is: 120,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,225.44 : 212,814 = 87,157.44 : x
  2. Step 2: Convert to fraction form
    154,225.44/212,814 = 87,157.44/x
  3. Step 3: Cross multiply
    154,225.44x = 212,814 × 87,157.44
  4. Step 4: Simplify right side
    154,225.44x = 18,548,323,436.16
  5. Step 5: Solve for x
    x = 18,548,323,436.16/154,225.44
  6. Step 6: Final answer
    x = 120,267.60

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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.