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Finding the Fourth Proportional to 154,143.50, 231,215.26 and 43,335.50

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Solution

The fourth proportional to 154,143.50, 231,215.26 and 43,335.50 is: 65,003.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,143.50 : 231,215.26 = 43,335.50 : x
  2. Step 2: Convert to fraction form
    154,143.50/231,215.26 = 43,335.50/x
  3. Step 3: Cross multiply
    154,143.50x = 231,215.26 × 43,335.50
  4. Step 4: Simplify right side
    154,143.50x = 10,019,828,899.73
  5. Step 5: Solve for x
    x = 10,019,828,899.73/154,143.50
  6. Step 6: Final answer
    x = 65,003.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.