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Finding the Fourth Proportional to 65,652.49, 90,606.90 and 40,170.34

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Solution

The fourth proportional to 65,652.49, 90,606.90 and 40,170.34 is: 55,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,652.49 : 90,606.90 = 40,170.34 : x
  2. Step 2: Convert to fraction form
    65,652.49/90,606.90 = 40,170.34/x
  3. Step 3: Cross multiply
    65,652.49x = 90,606.90 × 40,170.34
  4. Step 4: Simplify right side
    65,652.49x = 3,639,709,979.35
  5. Step 5: Solve for x
    x = 3,639,709,979.35/65,652.49
  6. Step 6: Final answer
    x = 55,439.02

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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.