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Finding the Fourth Proportional to 230,485.57, 318,046.85 and 128,501.44

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Solution

The fourth proportional to 230,485.57, 318,046.85 and 128,501.44 is: 177,319.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,485.57 : 318,046.85 = 128,501.44 : x
  2. Step 2: Convert to fraction form
    230,485.57/318,046.85 = 128,501.44/x
  3. Step 3: Cross multiply
    230,485.57x = 318,046.85 × 128,501.44
  4. Step 4: Simplify right side
    230,485.57x = 40,869,477,569.96
  5. Step 5: Solve for x
    x = 40,869,477,569.96/230,485.57
  6. Step 6: Final answer
    x = 177,319.03

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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.