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Finding the Fourth Proportional to 210,667.55, 290,721.20 and 115,174.22

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Solution

The fourth proportional to 210,667.55, 290,721.20 and 115,174.22 is: 158,940.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,667.55 : 290,721.20 = 115,174.22 : x
  2. Step 2: Convert to fraction form
    210,667.55/290,721.20 = 115,174.22/x
  3. Step 3: Cross multiply
    210,667.55x = 290,721.20 × 115,174.22
  4. Step 4: Simplify right side
    210,667.55x = 33,483,585,417.99
  5. Step 5: Solve for x
    x = 33,483,585,417.99/210,667.55
  6. Step 6: Final answer
    x = 158,940.41

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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.