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Finding the Fourth Proportional to 203,421.54, 280,730.61 and 112,771.74

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Solution

The fourth proportional to 203,421.54, 280,730.61 and 112,771.74 is: 155,629.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,421.54 : 280,730.61 = 112,771.74 : x
  2. Step 2: Convert to fraction form
    203,421.54/280,730.61 = 112,771.74/x
  3. Step 3: Cross multiply
    203,421.54x = 280,730.61 × 112,771.74
  4. Step 4: Simplify right side
    203,421.54x = 31,658,480,413.70
  5. Step 5: Solve for x
    x = 31,658,480,413.70/203,421.54
  6. Step 6: Final answer
    x = 155,629.93

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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.