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Finding the Fourth Proportional to 92,978.88, 128,313.36 and 50,540.28

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Solution

The fourth proportional to 92,978.88, 128,313.36 and 50,540.28 is: 69,746.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.88 : 128,313.36 = 50,540.28 : x
  2. Step 2: Convert to fraction form
    92,978.88/128,313.36 = 50,540.28/x
  3. Step 3: Cross multiply
    92,978.88x = 128,313.36 × 50,540.28
  4. Step 4: Simplify right side
    92,978.88x = 6,484,993,142.14
  5. Step 5: Solve for x
    x = 6,484,993,142.14/92,978.88
  6. Step 6: Final answer
    x = 69,746.95

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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.