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Finding the Fourth Proportional to 239,885.94, 331,071.76 and 139,283.94

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Solution

The fourth proportional to 239,885.94, 331,071.76 and 139,283.94 is: 192,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,885.94 : 331,071.76 = 139,283.94 : x
  2. Step 2: Convert to fraction form
    239,885.94/331,071.76 = 139,283.94/x
  3. Step 3: Cross multiply
    239,885.94x = 331,071.76 × 139,283.94
  4. Step 4: Simplify right side
    239,885.94x = 46,112,979,155.53
  5. Step 5: Solve for x
    x = 46,112,979,155.53/239,885.94
  6. Step 6: Final answer
    x = 192,228.77

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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.