Home / 211,431.78-291,928.98-136,111.50

Finding the Fourth Proportional to 211,431.78, 291,928.98 and 136,111.50

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Solution

The fourth proportional to 211,431.78, 291,928.98 and 136,111.50 is: 187,932.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,431.78 : 291,928.98 = 136,111.50 : x
  2. Step 2: Convert to fraction form
    211,431.78/291,928.98 = 136,111.50/x
  3. Step 3: Cross multiply
    211,431.78x = 291,928.98 × 136,111.50
  4. Step 4: Simplify right side
    211,431.78x = 39,734,891,361.27
  5. Step 5: Solve for x
    x = 39,734,891,361.27/211,431.78
  6. Step 6: Final answer
    x = 187,932.44

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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.