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Finding the Fourth Proportional to 101,008.92, 139,393.22 and 55,688.51

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Solution

The fourth proportional to 101,008.92, 139,393.22 and 55,688.51 is: 76,850.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.92 : 139,393.22 = 55,688.51 : x
  2. Step 2: Convert to fraction form
    101,008.92/139,393.22 = 55,688.51/x
  3. Step 3: Cross multiply
    101,008.92x = 139,393.22 × 55,688.51
  4. Step 4: Simplify right side
    101,008.92x = 7,762,600,795.94
  5. Step 5: Solve for x
    x = 7,762,600,795.94/101,008.92
  6. Step 6: Final answer
    x = 76,850.65

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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.