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Finding the Fourth Proportional to 99,635.70, 149,349.74 and 43,460.72

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Solution

The fourth proportional to 99,635.70, 149,349.74 and 43,460.72 is: 65,145.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,635.70 : 149,349.74 = 43,460.72 : x
  2. Step 2: Convert to fraction form
    99,635.70/149,349.74 = 43,460.72/x
  3. Step 3: Cross multiply
    99,635.70x = 149,349.74 × 43,460.72
  4. Step 4: Simplify right side
    99,635.70x = 6,490,846,268.16
  5. Step 5: Solve for x
    x = 6,490,846,268.16/99,635.70
  6. Step 6: Final answer
    x = 65,145.79

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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.