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Finding the Fourth Proportional to 228,708.23, 315,613.16 and 126,731.45

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Solution

The fourth proportional to 228,708.23, 315,613.16 and 126,731.45 is: 174,887.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,708.23 : 315,613.16 = 126,731.45 : x
  2. Step 2: Convert to fraction form
    228,708.23/315,613.16 = 126,731.45/x
  3. Step 3: Cross multiply
    228,708.23x = 315,613.16 × 126,731.45
  4. Step 4: Simplify right side
    228,708.23x = 39,998,114,036.50
  5. Step 5: Solve for x
    x = 39,998,114,036.50/228,708.23
  6. Step 6: Final answer
    x = 174,887.08

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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.