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Finding the Fourth Proportional to 65,446.57, 90,313.89 and 39,995.51

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Solution

The fourth proportional to 65,446.57, 90,313.89 and 39,995.51 is: 55,192.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,446.57 : 90,313.89 = 39,995.51 : x
  2. Step 2: Convert to fraction form
    65,446.57/90,313.89 = 39,995.51/x
  3. Step 3: Cross multiply
    65,446.57x = 90,313.89 × 39,995.51
  4. Step 4: Simplify right side
    65,446.57x = 3,612,150,090.63
  5. Step 5: Solve for x
    x = 3,612,150,090.63/65,446.57
  6. Step 6: Final answer
    x = 55,192.36

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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.