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Finding the Fourth Proportional to 74,663.37, 102,978.54 and 50,749.74

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Solution

The fourth proportional to 74,663.37, 102,978.54 and 50,749.74 is: 69,995.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,663.37 : 102,978.54 = 50,749.74 : x
  2. Step 2: Convert to fraction form
    74,663.37/102,978.54 = 50,749.74/x
  3. Step 3: Cross multiply
    74,663.37x = 102,978.54 × 50,749.74
  4. Step 4: Simplify right side
    74,663.37x = 5,226,134,130.58
  5. Step 5: Solve for x
    x = 5,226,134,130.58/74,663.37
  6. Step 6: Final answer
    x = 69,995.96

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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.