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Finding the Fourth Proportional to 238,671.73, 358,018.81 and 78,761.63

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Solution

The fourth proportional to 238,671.73, 358,018.81 and 78,761.63 is: 118,146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,671.73 : 358,018.81 = 78,761.63 : x
  2. Step 2: Convert to fraction form
    238,671.73/358,018.81 = 78,761.63/x
  3. Step 3: Cross multiply
    238,671.73x = 358,018.81 × 78,761.63
  4. Step 4: Simplify right side
    238,671.73x = 28,198,146,721.12
  5. Step 5: Solve for x
    x = 28,198,146,721.12/238,671.73
  6. Step 6: Final answer
    x = 118,146.15

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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.