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Finding the Fourth Proportional to 154,689.24, 213,471.14 and 87,621.24

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Solution

The fourth proportional to 154,689.24, 213,471.14 and 87,621.24 is: 120,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,689.24 : 213,471.14 = 87,621.24 : x
  2. Step 2: Convert to fraction form
    154,689.24/213,471.14 = 87,621.24/x
  3. Step 3: Cross multiply
    154,689.24x = 213,471.14 × 87,621.24
  4. Step 4: Simplify right side
    154,689.24x = 18,704,605,991.01
  5. Step 5: Solve for x
    x = 18,704,605,991.01/154,689.24
  6. Step 6: Final answer
    x = 120,917.30

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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.