Home / 154,156.20-212,771.10-100,347.49

Finding the Fourth Proportional to 154,156.20, 212,771.10 and 100,347.49

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Solution

The fourth proportional to 154,156.20, 212,771.10 and 100,347.49 is: 138,502.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,156.20 : 212,771.10 = 100,347.49 : x
  2. Step 2: Convert to fraction form
    154,156.20/212,771.10 = 100,347.49/x
  3. Step 3: Cross multiply
    154,156.20x = 212,771.10 × 100,347.49
  4. Step 4: Simplify right side
    154,156.20x = 21,351,045,829.54
  5. Step 5: Solve for x
    x = 21,351,045,829.54/154,156.20
  6. Step 6: Final answer
    x = 138,502.67

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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.