Home / 231,385.72-319,311.37-129,410.77

Finding the Fourth Proportional to 231,385.72, 319,311.37 and 129,410.77

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Solution

The fourth proportional to 231,385.72, 319,311.37 and 129,410.77 is: 178,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,385.72 : 319,311.37 = 129,410.77 : x
  2. Step 2: Convert to fraction form
    231,385.72/319,311.37 = 129,410.77/x
  3. Step 3: Cross multiply
    231,385.72x = 319,311.37 × 129,410.77
  4. Step 4: Simplify right side
    231,385.72x = 41,322,330,261.45
  5. Step 5: Solve for x
    x = 41,322,330,261.45/231,385.72
  6. Step 6: Final answer
    x = 178,586.35

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1.5x scale

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.