Home / 258,715.35-388,137.62-90,238.10

Finding the Fourth Proportional to 258,715.35, 388,137.62 and 90,238.10

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Solution

The fourth proportional to 258,715.35, 388,137.62 and 90,238.10 is: 135,379.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,715.35 : 388,137.62 = 90,238.10 : x
  2. Step 2: Convert to fraction form
    258,715.35/388,137.62 = 90,238.10/x
  3. Step 3: Cross multiply
    258,715.35x = 388,137.62 × 90,238.10
  4. Step 4: Simplify right side
    258,715.35x = 35,024,799,652.23
  5. Step 5: Solve for x
    x = 35,024,799,652.23/258,715.35
  6. Step 6: Final answer
    x = 135,379.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.