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Finding the Fourth Proportional to 66,255.54, 91,401.93 and 39,382.98

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Solution

The fourth proportional to 66,255.54, 91,401.93 and 39,382.98 is: 54,330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,255.54 : 91,401.93 = 39,382.98 : x
  2. Step 2: Convert to fraction form
    66,255.54/91,401.93 = 39,382.98/x
  3. Step 3: Cross multiply
    66,255.54x = 91,401.93 × 39,382.98
  4. Step 4: Simplify right side
    66,255.54x = 3,599,680,381.15
  5. Step 5: Solve for x
    x = 3,599,680,381.15/66,255.54
  6. Step 6: Final answer
    x = 54,330.25

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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.