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Finding the Fourth Proportional to 93,144, 128,538.72 and 50,702.84

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Solution

The fourth proportional to 93,144, 128,538.72 and 50,702.84 is: 69,969.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,144 : 128,538.72 = 50,702.84 : x
  2. Step 2: Convert to fraction form
    93,144/128,538.72 = 50,702.84/x
  3. Step 3: Cross multiply
    93,144x = 128,538.72 × 50,702.84
  4. Step 4: Simplify right side
    93,144x = 6,517,277,511.27
  5. Step 5: Solve for x
    x = 6,517,277,511.27/93,144
  6. Step 6: Final answer
    x = 69,969.91

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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.