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Finding the Fourth Proportional to 210,668.55, 290,722.57 and 115,175.22

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Solution

The fourth proportional to 210,668.55, 290,722.57 and 115,175.22 is: 158,941.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,668.55 : 290,722.57 = 115,175.22 : x
  2. Step 2: Convert to fraction form
    210,668.55/290,722.57 = 115,175.22/x
  3. Step 3: Cross multiply
    210,668.55x = 290,722.57 × 115,175.22
  4. Step 4: Simplify right side
    210,668.55x = 33,484,035,958.72
  5. Step 5: Solve for x
    x = 33,484,035,958.72/210,668.55
  6. Step 6: Final answer
    x = 158,941.79

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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.