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Finding the Fourth Proportional to 230,902.58, 318,642.48 and 128,929.74

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Solution

The fourth proportional to 230,902.58, 318,642.48 and 128,929.74 is: 177,921.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,902.58 : 318,642.48 = 128,929.74 : x
  2. Step 2: Convert to fraction form
    230,902.58/318,642.48 = 128,929.74/x
  3. Step 3: Cross multiply
    230,902.58x = 318,642.48 × 128,929.74
  4. Step 4: Simplify right side
    230,902.58x = 41,082,492,099.36
  5. Step 5: Solve for x
    x = 41,082,492,099.36/230,902.58
  6. Step 6: Final answer
    x = 177,921.33

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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.