Home / 90,621.72-135,735.48-43,776

Finding the Fourth Proportional to 90,621.72, 135,735.48 and 43,776

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Solution

The fourth proportional to 90,621.72, 135,735.48 and 43,776 is: 65,568.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,621.72 : 135,735.48 = 43,776 : x
  2. Step 2: Convert to fraction form
    90,621.72/135,735.48 = 43,776/x
  3. Step 3: Cross multiply
    90,621.72x = 135,735.48 × 43,776
  4. Step 4: Simplify right side
    90,621.72x = 5,941,956,372.48
  5. Step 5: Solve for x
    x = 5,941,956,372.48/90,621.72
  6. Step 6: Final answer
    x = 65,568.79

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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.