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Finding the Fourth Proportional to 101,230.35, 139,698.93 and 55,909.47

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Solution

The fourth proportional to 101,230.35, 139,698.93 and 55,909.47 is: 77,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,230.35 : 139,698.93 = 55,909.47 : x
  2. Step 2: Convert to fraction form
    101,230.35/139,698.93 = 55,909.47/x
  3. Step 3: Cross multiply
    101,230.35x = 139,698.93 × 55,909.47
  4. Step 4: Simplify right side
    101,230.35x = 7,810,493,135.87
  5. Step 5: Solve for x
    x = 7,810,493,135.87/101,230.35
  6. Step 6: Final answer
    x = 77,155.65

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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.