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Finding the Fourth Proportional to 230,774.78, 318,485.21 and 128,820.11

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Solution

The fourth proportional to 230,774.78, 318,485.21 and 128,820.11 is: 177,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,774.78 : 318,485.21 = 128,820.11 : x
  2. Step 2: Convert to fraction form
    230,774.78/318,485.21 = 128,820.11/x
  3. Step 3: Cross multiply
    230,774.78x = 318,485.21 × 128,820.11
  4. Step 4: Simplify right side
    230,774.78x = 41,027,297,549.05
  5. Step 5: Solve for x
    x = 41,027,297,549.05/230,774.78
  6. Step 6: Final answer
    x = 177,780.68

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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.