Home / 211,275.36-291,562.29-115,780

Finding the Fourth Proportional to 211,275.36, 291,562.29 and 115,780

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Solution

The fourth proportional to 211,275.36, 291,562.29 and 115,780 is: 159,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,275.36 : 291,562.29 = 115,780 : x
  2. Step 2: Convert to fraction form
    211,275.36/291,562.29 = 115,780/x
  3. Step 3: Cross multiply
    211,275.36x = 291,562.29 × 115,780
  4. Step 4: Simplify right side
    211,275.36x = 33,757,081,936.20
  5. Step 5: Solve for x
    x = 33,757,081,936.20/211,275.36
  6. Step 6: Final answer
    x = 159,777.66

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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.