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Finding the Fourth Proportional to 65,512.51, 90,315.67 and 55,400.33

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Solution

The fourth proportional to 65,512.51, 90,315.67 and 55,400.33 is: 76,375.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,512.51 : 90,315.67 = 55,400.33 : x
  2. Step 2: Convert to fraction form
    65,512.51/90,315.67 = 55,400.33/x
  3. Step 3: Cross multiply
    65,512.51x = 90,315.67 × 55,400.33
  4. Step 4: Simplify right side
    65,512.51x = 5,003,517,922.17
  5. Step 5: Solve for x
    x = 5,003,517,922.17/65,512.51
  6. Step 6: Final answer
    x = 76,375.00

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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.