Home / 210,971.85-291,149.16-120,342.57

Finding the Fourth Proportional to 210,971.85, 291,149.16 and 120,342.57

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Solution

The fourth proportional to 210,971.85, 291,149.16 and 120,342.57 is: 166,077.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,971.85 : 291,149.16 = 120,342.57 : x
  2. Step 2: Convert to fraction form
    210,971.85/291,149.16 = 120,342.57/x
  3. Step 3: Cross multiply
    210,971.85x = 291,149.16 × 120,342.57
  4. Step 4: Simplify right side
    210,971.85x = 35,037,638,167.74
  5. Step 5: Solve for x
    x = 35,037,638,167.74/210,971.85
  6. Step 6: Final answer
    x = 166,077.31

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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.