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Finding the Fourth Proportional to 228,079.33, 342,429.26 and 128,309.74

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Solution

The fourth proportional to 228,079.33, 342,429.26 and 128,309.74 is: 192,639.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,079.33 : 342,429.26 = 128,309.74 : x
  2. Step 2: Convert to fraction form
    228,079.33/342,429.26 = 128,309.74/x
  3. Step 3: Cross multiply
    228,079.33x = 342,429.26 × 128,309.74
  4. Step 4: Simplify right side
    228,079.33x = 43,937,007,821.37
  5. Step 5: Solve for x
    x = 43,937,007,821.37/228,079.33
  6. Step 6: Final answer
    x = 192,639.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.