Home / 66,056.19-91,157.30-39,220.75

Finding the Fourth Proportional to 66,056.19, 91,157.30 and 39,220.75

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Solution

The fourth proportional to 66,056.19, 91,157.30 and 39,220.75 is: 54,124.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,056.19 : 91,157.30 = 39,220.75 : x
  2. Step 2: Convert to fraction form
    66,056.19/91,157.30 = 39,220.75/x
  3. Step 3: Cross multiply
    66,056.19x = 91,157.30 × 39,220.75
  4. Step 4: Simplify right side
    66,056.19x = 3,575,257,477.87
  5. Step 5: Solve for x
    x = 3,575,257,477.87/66,056.19
  6. Step 6: Final answer
    x = 54,124.49

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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.