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Finding the Fourth Proportional to 65,446.85, 90,314.26 and 39,995.82

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Solution

The fourth proportional to 65,446.85, 90,314.26 and 39,995.82 is: 55,192.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,446.85 : 90,314.26 = 39,995.82 : x
  2. Step 2: Convert to fraction form
    65,446.85/90,314.26 = 39,995.82/x
  3. Step 3: Cross multiply
    65,446.85x = 90,314.26 × 39,995.82
  4. Step 4: Simplify right side
    65,446.85x = 3,612,192,886.39
  5. Step 5: Solve for x
    x = 3,612,192,886.39/65,446.85
  6. Step 6: Final answer
    x = 55,192.77

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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.