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Finding the Fourth Proportional to 65,581.70, 90,507.69 and 40,092.89

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Solution

The fourth proportional to 65,581.70, 90,507.69 and 40,092.89 is: 55,331.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,581.70 : 90,507.69 = 40,092.89 : x
  2. Step 2: Convert to fraction form
    65,581.70/90,507.69 = 40,092.89/x
  3. Step 3: Cross multiply
    65,581.70x = 90,507.69 × 40,092.89
  4. Step 4: Simplify right side
    65,581.70x = 3,628,714,406.79
  5. Step 5: Solve for x
    x = 3,628,714,406.79/65,581.70
  6. Step 6: Final answer
    x = 55,331.21

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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.