Home / 153,099.21-211,288.69-85,121.78

Finding the Fourth Proportional to 153,099.21, 211,288.69 and 85,121.78

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Solution

The fourth proportional to 153,099.21, 211,288.69 and 85,121.78 is: 117,474.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,099.21 : 211,288.69 = 85,121.78 : x
  2. Step 2: Convert to fraction form
    153,099.21/211,288.69 = 85,121.78/x
  3. Step 3: Cross multiply
    153,099.21x = 211,288.69 × 85,121.78
  4. Step 4: Simplify right side
    153,099.21x = 17,985,270,127.69
  5. Step 5: Solve for x
    x = 17,985,270,127.69/153,099.21
  6. Step 6: Final answer
    x = 117,474.61

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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.