Home / 66,281.35-91,438.04-39,408.59

Finding the Fourth Proportional to 66,281.35, 91,438.04 and 39,408.59

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Solution

The fourth proportional to 66,281.35, 91,438.04 and 39,408.59 is: 54,365.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.35 : 91,438.04 = 39,408.59 : x
  2. Step 2: Convert to fraction form
    66,281.35/91,438.04 = 39,408.59/x
  3. Step 3: Cross multiply
    66,281.35x = 91,438.04 × 39,408.59
  4. Step 4: Simplify right side
    66,281.35x = 3,603,443,771.57
  5. Step 5: Solve for x
    x = 3,603,443,771.57/66,281.35
  6. Step 6: Final answer
    x = 54,365.88

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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.