Home / 211,002.08-291,189.75-115,508.78

Finding the Fourth Proportional to 211,002.08, 291,189.75 and 115,508.78

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Solution

The fourth proportional to 211,002.08, 291,189.75 and 115,508.78 is: 159,405.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,002.08 : 291,189.75 = 115,508.78 : x
  2. Step 2: Convert to fraction form
    211,002.08/291,189.75 = 115,508.78/x
  3. Step 3: Cross multiply
    211,002.08x = 291,189.75 × 115,508.78
  4. Step 4: Simplify right side
    211,002.08x = 33,634,972,771.01
  5. Step 5: Solve for x
    x = 33,634,972,771.01/211,002.08
  6. Step 6: Final answer
    x = 159,405.88

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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.