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Finding the Fourth Proportional to 228,339.47, 315,101.95 and 126,369.18

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Solution

The fourth proportional to 228,339.47, 315,101.95 and 126,369.18 is: 174,385.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,339.47 : 315,101.95 = 126,369.18 : x
  2. Step 2: Convert to fraction form
    228,339.47/315,101.95 = 126,369.18/x
  3. Step 3: Cross multiply
    228,339.47x = 315,101.95 × 126,369.18
  4. Step 4: Simplify right side
    228,339.47x = 39,819,174,721.98
  5. Step 5: Solve for x
    x = 39,819,174,721.98/228,339.47
  6. Step 6: Final answer
    x = 174,385.86

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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.