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Finding the Fourth Proportional to 66,412.80, 91,648 and 36,604.16

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Solution

The fourth proportional to 66,412.80, 91,648 and 36,604.16 is: 50,512.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,412.80 : 91,648 = 36,604.16 : x
  2. Step 2: Convert to fraction form
    66,412.80/91,648 = 36,604.16/x
  3. Step 3: Cross multiply
    66,412.80x = 91,648 × 36,604.16
  4. Step 4: Simplify right side
    66,412.80x = 3,354,698,055.68
  5. Step 5: Solve for x
    x = 3,354,698,055.68/66,412.80
  6. Step 6: Final answer
    x = 50,512.82

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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.