Home / 230,898.20-318,638.16-128,917.76

Finding the Fourth Proportional to 230,898.20, 318,638.16 and 128,917.76

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Solution

The fourth proportional to 230,898.20, 318,638.16 and 128,917.76 is: 177,905.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,898.20 : 318,638.16 = 128,917.76 : x
  2. Step 2: Convert to fraction form
    230,898.20/318,638.16 = 128,917.76/x
  3. Step 3: Cross multiply
    230,898.20x = 318,638.16 × 128,917.76
  4. Step 4: Simplify right side
    230,898.20x = 41,078,117,837.72
  5. Step 5: Solve for x
    x = 41,078,117,837.72/230,898.20
  6. Step 6: Final answer
    x = 177,905.75

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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.