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Finding the Fourth Proportional to 228,709.23, 315,614.54 and 126,732.45

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Solution

The fourth proportional to 228,709.23, 315,614.54 and 126,732.45 is: 174,888.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,709.23 : 315,614.54 = 126,732.45 : x
  2. Step 2: Convert to fraction form
    228,709.23/315,614.54 = 126,732.45/x
  3. Step 3: Cross multiply
    228,709.23x = 315,614.54 × 126,732.45
  4. Step 4: Simplify right side
    228,709.23x = 39,998,603,909.82
  5. Step 5: Solve for x
    x = 39,998,603,909.82/228,709.23
  6. Step 6: Final answer
    x = 174,888.46

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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.