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Finding the Fourth Proportional to 66,478.40, 91,739.52 and 36,670.40

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Solution

The fourth proportional to 66,478.40, 91,739.52 and 36,670.40 is: 50,604.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,478.40 : 91,739.52 = 36,670.40 : x
  2. Step 2: Convert to fraction form
    66,478.40/91,739.52 = 36,670.40/x
  3. Step 3: Cross multiply
    66,478.40x = 91,739.52 × 36,670.40
  4. Step 4: Simplify right side
    66,478.40x = 3,364,124,894.21
  5. Step 5: Solve for x
    x = 3,364,124,894.21/66,478.40
  6. Step 6: Final answer
    x = 50,604.78

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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.