Home / 90,890.91-136,063.60-55,242.21

Finding the Fourth Proportional to 90,890.91, 136,063.60 and 55,242.21

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Solution

The fourth proportional to 90,890.91, 136,063.60 and 55,242.21 is: 82,697.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,890.91 : 136,063.60 = 55,242.21 : x
  2. Step 2: Convert to fraction form
    90,890.91/136,063.60 = 55,242.21/x
  3. Step 3: Cross multiply
    90,890.91x = 136,063.60 × 55,242.21
  4. Step 4: Simplify right side
    90,890.91x = 7,516,453,284.24
  5. Step 5: Solve for x
    x = 7,516,453,284.24/90,890.91
  6. Step 6: Final answer
    x = 82,697.52

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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.