Home / 211,519.31-291,731.67-130,991.54

Finding the Fourth Proportional to 211,519.31, 291,731.67 and 130,991.54

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Solution

The fourth proportional to 211,519.31, 291,731.67 and 130,991.54 is: 180,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,519.31 : 291,731.67 = 130,991.54 : x
  2. Step 2: Convert to fraction form
    211,519.31/291,731.67 = 130,991.54/x
  3. Step 3: Cross multiply
    211,519.31x = 291,731.67 × 130,991.54
  4. Step 4: Simplify right side
    211,519.31x = 38,214,379,261.41
  5. Step 5: Solve for x
    x = 38,214,379,261.41/211,519.31
  6. Step 6: Final answer
    x = 180,666.15

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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.