Home / 66,147.55-91,281-39,289.35

Finding the Fourth Proportional to 66,147.55, 91,281 and 39,289.35

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Solution

The fourth proportional to 66,147.55, 91,281 and 39,289.35 is: 54,217.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,147.55 : 91,281 = 39,289.35 : x
  2. Step 2: Convert to fraction form
    66,147.55/91,281 = 39,289.35/x
  3. Step 3: Cross multiply
    66,147.55x = 91,281 × 39,289.35
  4. Step 4: Simplify right side
    66,147.55x = 3,586,371,157.35
  5. Step 5: Solve for x
    x = 3,586,371,157.35/66,147.55
  6. Step 6: Final answer
    x = 54,217.75

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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.