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Finding the Fourth Proportional to 48,978.19, 67,595.21 and 28,839.97

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Solution

The fourth proportional to 48,978.19, 67,595.21 and 28,839.97 is: 39,802.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,978.19 : 67,595.21 = 28,839.97 : x
  2. Step 2: Convert to fraction form
    48,978.19/67,595.21 = 28,839.97/x
  3. Step 3: Cross multiply
    48,978.19x = 67,595.21 × 28,839.97
  4. Step 4: Simplify right side
    48,978.19x = 1,949,443,828.54
  5. Step 5: Solve for x
    x = 1,949,443,828.54/48,978.19
  6. Step 6: Final answer
    x = 39,802.28

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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.