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Finding the Fourth Proportional to 230,630.89, 318,271.14 and 128,653.81

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Solution

The fourth proportional to 230,630.89, 318,271.14 and 128,653.81 is: 177,542.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,630.89 : 318,271.14 = 128,653.81 : x
  2. Step 2: Convert to fraction form
    230,630.89/318,271.14 = 128,653.81/x
  3. Step 3: Cross multiply
    230,630.89x = 318,271.14 × 128,653.81
  4. Step 4: Simplify right side
    230,630.89x = 40,946,792,539.42
  5. Step 5: Solve for x
    x = 40,946,792,539.42/230,630.89
  6. Step 6: Final answer
    x = 177,542.54

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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.