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Finding the Fourth Proportional to 229,709.36, 317,005.77 and 139,081.90

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Solution

The fourth proportional to 229,709.36, 317,005.77 and 139,081.90 is: 191,937.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,709.36 : 317,005.77 = 139,081.90 : x
  2. Step 2: Convert to fraction form
    229,709.36/317,005.77 = 139,081.90/x
  3. Step 3: Cross multiply
    229,709.36x = 317,005.77 × 139,081.90
  4. Step 4: Simplify right side
    229,709.36x = 44,089,764,802.56
  5. Step 5: Solve for x
    x = 44,089,764,802.56/229,709.36
  6. Step 6: Final answer
    x = 191,937.17

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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.