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Finding the Fourth Proportional to 128,606.10, 192,581.10 and 102,362.10

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Solution

The fourth proportional to 128,606.10, 192,581.10 and 102,362.10 is: 153,282.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.10 : 192,581.10 = 102,362.10 : x
  2. Step 2: Convert to fraction form
    128,606.10/192,581.10 = 102,362.10/x
  3. Step 3: Cross multiply
    128,606.10x = 192,581.10 × 102,362.10
  4. Step 4: Simplify right side
    128,606.10x = 19,713,005,816.31
  5. Step 5: Solve for x
    x = 19,713,005,816.31/128,606.10
  6. Step 6: Final answer
    x = 153,282.04

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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.