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Finding the Fourth Proportional to 101,365.12, 139,879.74 and 56,040.22

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Solution

The fourth proportional to 101,365.12, 139,879.74 and 56,040.22 is: 77,333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,365.12 : 139,879.74 = 56,040.22 : x
  2. Step 2: Convert to fraction form
    101,365.12/139,879.74 = 56,040.22/x
  3. Step 3: Cross multiply
    101,365.12x = 139,879.74 × 56,040.22
  4. Step 4: Simplify right side
    101,365.12x = 7,838,891,403.14
  5. Step 5: Solve for x
    x = 7,838,891,403.14/101,365.12
  6. Step 6: Final answer
    x = 77,333.22

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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.