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Finding the Fourth Proportional to 93,381.72, 128,866.32 and 50,939.88

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Solution

The fourth proportional to 93,381.72, 128,866.32 and 50,939.88 is: 70,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,381.72 : 128,866.32 = 50,939.88 : x
  2. Step 2: Convert to fraction form
    93,381.72/128,866.32 = 50,939.88/x
  3. Step 3: Cross multiply
    93,381.72x = 128,866.32 × 50,939.88
  4. Step 4: Simplify right side
    93,381.72x = 6,564,434,876.84
  5. Step 5: Solve for x
    x = 6,564,434,876.84/93,381.72
  6. Step 6: Final answer
    x = 70,296.79

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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.