Home / 66,370.56-91,588.40-38,777.78

Finding the Fourth Proportional to 66,370.56, 91,588.40 and 38,777.78

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Solution

The fourth proportional to 66,370.56, 91,588.40 and 38,777.78 is: 53,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,370.56 : 91,588.40 = 38,777.78 : x
  2. Step 2: Convert to fraction form
    66,370.56/91,588.40 = 38,777.78/x
  3. Step 3: Cross multiply
    66,370.56x = 91,588.40 × 38,777.78
  4. Step 4: Simplify right side
    66,370.56x = 3,551,594,825.75
  5. Step 5: Solve for x
    x = 3,551,594,825.75/66,370.56
  6. Step 6: Final answer
    x = 53,511.60

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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.