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Finding the Fourth Proportional to 230,757.74, 318,445.00 and 128,782.12

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Solution

The fourth proportional to 230,757.74, 318,445.00 and 128,782.12 is: 177,718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,757.74 : 318,445.00 = 128,782.12 : x
  2. Step 2: Convert to fraction form
    230,757.74/318,445.00 = 128,782.12/x
  3. Step 3: Cross multiply
    230,757.74x = 318,445.00 × 128,782.12
  4. Step 4: Simplify right side
    230,757.74x = 41,010,021,085.33
  5. Step 5: Solve for x
    x = 41,010,021,085.33/230,757.74
  6. Step 6: Final answer
    x = 177,718.94

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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.