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Finding the Fourth Proportional to 101,329.77, 139,835.53 and 55,390.35

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Solution

The fourth proportional to 101,329.77, 139,835.53 and 55,390.35 is: 76,438.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,329.77 : 139,835.53 = 55,390.35 : x
  2. Step 2: Convert to fraction form
    101,329.77/139,835.53 = 55,390.35/x
  3. Step 3: Cross multiply
    101,329.77x = 139,835.53 × 55,390.35
  4. Step 4: Simplify right side
    101,329.77x = 7,745,539,160.25
  5. Step 5: Solve for x
    x = 7,745,539,160.25/101,329.77
  6. Step 6: Final answer
    x = 76,438.93

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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.