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Finding the Fourth Proportional to 65,636.16, 90,571.68 and 40,480.80

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Solution

The fourth proportional to 65,636.16, 90,571.68 and 40,480.80 is: 55,859.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,636.16 : 90,571.68 = 40,480.80 : x
  2. Step 2: Convert to fraction form
    65,636.16/90,571.68 = 40,480.80/x
  3. Step 3: Cross multiply
    65,636.16x = 90,571.68 × 40,480.80
  4. Step 4: Simplify right side
    65,636.16x = 3,666,414,063.74
  5. Step 5: Solve for x
    x = 3,666,414,063.74/65,636.16
  6. Step 6: Final answer
    x = 55,859.67

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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.