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Finding the Fourth Proportional to 238,316.78, 328,879.41 and 130,889

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Solution

The fourth proportional to 238,316.78, 328,879.41 and 130,889 is: 180,628.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,316.78 : 328,879.41 = 130,889 : x
  2. Step 2: Convert to fraction form
    238,316.78/328,879.41 = 130,889/x
  3. Step 3: Cross multiply
    238,316.78x = 328,879.41 × 130,889
  4. Step 4: Simplify right side
    238,316.78x = 43,046,697,095.49
  5. Step 5: Solve for x
    x = 43,046,697,095.49/238,316.78
  6. Step 6: Final answer
    x = 180,628.06

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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.