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Finding the Fourth Proportional to 128,554.48, 192,496.36 and 103,457.44

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Solution

The fourth proportional to 128,554.48, 192,496.36 and 103,457.44 is: 154,916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,554.48 : 192,496.36 = 103,457.44 : x
  2. Step 2: Convert to fraction form
    128,554.48/192,496.36 = 103,457.44/x
  3. Step 3: Cross multiply
    128,554.48x = 192,496.36 × 103,457.44
  4. Step 4: Simplify right side
    128,554.48x = 19,915,180,614.92
  5. Step 5: Solve for x
    x = 19,915,180,614.92/128,554.48
  6. Step 6: Final answer
    x = 154,916.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.