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Finding the Fourth Proportional to 154,712.31, 213,502.99 and 87,644.31

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Solution

The fourth proportional to 154,712.31, 213,502.99 and 87,644.31 is: 120,949.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,712.31 : 213,502.99 = 87,644.31 : x
  2. Step 2: Convert to fraction form
    154,712.31/213,502.99 = 87,644.31/x
  3. Step 3: Cross multiply
    154,712.31x = 213,502.99 × 87,644.31
  4. Step 4: Simplify right side
    154,712.31x = 18,712,322,241.49
  5. Step 5: Solve for x
    x = 18,712,322,241.49/154,712.31
  6. Step 6: Final answer
    x = 120,949.15

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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.