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Finding the Fourth Proportional to 230,383.95, 317,919.60 and 128,420.53

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Solution

The fourth proportional to 230,383.95, 317,919.60 and 128,420.53 is: 177,214.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,383.95 : 317,919.60 = 128,420.53 : x
  2. Step 2: Convert to fraction form
    230,383.95/317,919.60 = 128,420.53/x
  3. Step 3: Cross multiply
    230,383.95x = 317,919.60 × 128,420.53
  4. Step 4: Simplify right side
    230,383.95x = 40,827,403,529.39
  5. Step 5: Solve for x
    x = 40,827,403,529.39/230,383.95
  6. Step 6: Final answer
    x = 177,214.62

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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.