Home / 65,401.21-90,255.90-38,566.72

Finding the Fourth Proportional to 65,401.21, 90,255.90 and 38,566.72

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Solution

The fourth proportional to 65,401.21, 90,255.90 and 38,566.72 is: 53,223.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,401.21 : 90,255.90 = 38,566.72 : x
  2. Step 2: Convert to fraction form
    65,401.21/90,255.90 = 38,566.72/x
  3. Step 3: Cross multiply
    65,401.21x = 90,255.90 × 38,566.72
  4. Step 4: Simplify right side
    65,401.21x = 3,480,874,023.65
  5. Step 5: Solve for x
    x = 3,480,874,023.65/65,401.21
  6. Step 6: Final answer
    x = 53,223.39

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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.