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Finding the Fourth Proportional to 228,089.08, 342,443.88 and 128,319.48

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Solution

The fourth proportional to 228,089.08, 342,443.88 and 128,319.48 is: 192,653.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,089.08 : 342,443.88 = 128,319.48 : x
  2. Step 2: Convert to fraction form
    228,089.08/342,443.88 = 128,319.48/x
  3. Step 3: Cross multiply
    228,089.08x = 342,443.88 × 128,319.48
  4. Step 4: Simplify right side
    228,089.08x = 43,942,220,610.78
  5. Step 5: Solve for x
    x = 43,942,220,610.78/228,089.08
  6. Step 6: Final answer
    x = 192,653.77

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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.