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Finding the Fourth Proportional to 228,948.50, 315,948.94 and 128,346.50

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Solution

The fourth proportional to 228,948.50, 315,948.94 and 128,346.50 is: 177,118.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,948.50 : 315,948.94 = 128,346.50 : x
  2. Step 2: Convert to fraction form
    228,948.50/315,948.94 = 128,346.50/x
  3. Step 3: Cross multiply
    228,948.50x = 315,948.94 × 128,346.50
  4. Step 4: Simplify right side
    228,948.50x = 40,550,940,627.71
  5. Step 5: Solve for x
    x = 40,550,940,627.71/228,948.50
  6. Step 6: Final answer
    x = 177,118.18

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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.