Home / 153,837.36-212,301-90,171.36

Finding the Fourth Proportional to 153,837.36, 212,301 and 90,171.36

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Solution

The fourth proportional to 153,837.36, 212,301 and 90,171.36 is: 124,439.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,837.36 : 212,301 = 90,171.36 : x
  2. Step 2: Convert to fraction form
    153,837.36/212,301 = 90,171.36/x
  3. Step 3: Cross multiply
    153,837.36x = 212,301 × 90,171.36
  4. Step 4: Simplify right side
    153,837.36x = 19,143,469,899.36
  5. Step 5: Solve for x
    x = 19,143,469,899.36/153,837.36
  6. Step 6: Final answer
    x = 124,439.67

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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.