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Finding the Fourth Proportional to 100,994.36, 139,365.95 and 55,670.00

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Solution

The fourth proportional to 100,994.36, 139,365.95 and 55,670.00 is: 76,821.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,994.36 : 139,365.95 = 55,670.00 : x
  2. Step 2: Convert to fraction form
    100,994.36/139,365.95 = 55,670.00/x
  3. Step 3: Cross multiply
    100,994.36x = 139,365.95 × 55,670.00
  4. Step 4: Simplify right side
    100,994.36x = 7,758,501,739.67
  5. Step 5: Solve for x
    x = 7,758,501,739.67/100,994.36
  6. Step 6: Final answer
    x = 76,821.14

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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.