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Finding the Fourth Proportional to 65,446.71, 90,313.98 and 39,995.64

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Solution

The fourth proportional to 65,446.71, 90,313.98 and 39,995.64 is: 55,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,446.71 : 90,313.98 = 39,995.64 : x
  2. Step 2: Convert to fraction form
    65,446.71/90,313.98 = 39,995.64/x
  3. Step 3: Cross multiply
    65,446.71x = 90,313.98 × 39,995.64
  4. Step 4: Simplify right side
    65,446.71x = 3,612,165,431.05
  5. Step 5: Solve for x
    x = 3,612,165,431.05/65,446.71
  6. Step 6: Final answer
    x = 55,192.47

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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.