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Finding the Fourth Proportional to 228,705.50, 315,608.88 and 126,730.06

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Solution

The fourth proportional to 228,705.50, 315,608.88 and 126,730.06 is: 174,884.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,705.50 : 315,608.88 = 126,730.06 : x
  2. Step 2: Convert to fraction form
    228,705.50/315,608.88 = 126,730.06/x
  3. Step 3: Cross multiply
    228,705.50x = 315,608.88 × 126,730.06
  4. Step 4: Simplify right side
    228,705.50x = 39,997,132,298.93
  5. Step 5: Solve for x
    x = 39,997,132,298.93/228,705.50
  6. Step 6: Final answer
    x = 174,884.87

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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.