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Finding the Fourth Proportional to 210,628.80, 290,662.56 and 115,135.92

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Solution

The fourth proportional to 210,628.80, 290,662.56 and 115,135.92 is: 158,884.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,628.80 : 290,662.56 = 115,135.92 : x
  2. Step 2: Convert to fraction form
    210,628.80/290,662.56 = 115,135.92/x
  3. Step 3: Cross multiply
    210,628.80x = 290,662.56 × 115,135.92
  4. Step 4: Simplify right side
    210,628.80x = 33,465,701,255.16
  5. Step 5: Solve for x
    x = 33,465,701,255.16/210,628.80
  6. Step 6: Final answer
    x = 158,884.74

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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.