Home / 211,117.31-291,269.53-120,408.07

Finding the Fourth Proportional to 211,117.31, 291,269.53 and 120,408.07

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Solution

The fourth proportional to 211,117.31, 291,269.53 and 120,408.07 is: 166,121.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,117.31 : 291,269.53 = 120,408.07 : x
  2. Step 2: Convert to fraction form
    211,117.31/291,269.53 = 120,408.07/x
  3. Step 3: Cross multiply
    211,117.31x = 291,269.53 × 120,408.07
  4. Step 4: Simplify right side
    211,117.31x = 35,071,201,957.11
  5. Step 5: Solve for x
    x = 35,071,201,957.11/211,117.31
  6. Step 6: Final answer
    x = 166,121.87

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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.