Home / 210,631.78-290,676.36-115,147.36

Finding the Fourth Proportional to 210,631.78, 290,676.36 and 115,147.36

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Solution

The fourth proportional to 210,631.78, 290,676.36 and 115,147.36 is: 158,905.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,631.78 : 290,676.36 = 115,147.36 : x
  2. Step 2: Convert to fraction form
    210,631.78/290,676.36 = 115,147.36/x
  3. Step 3: Cross multiply
    210,631.78x = 290,676.36 × 115,147.36
  4. Step 4: Simplify right side
    210,631.78x = 33,470,615,468.41
  5. Step 5: Solve for x
    x = 33,470,615,468.41/210,631.78
  6. Step 6: Final answer
    x = 158,905.82

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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.