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Finding the Fourth Proportional to 236,133.81, 325,864.91 and 128,703.93

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Solution

The fourth proportional to 236,133.81, 325,864.91 and 128,703.93 is: 177,611.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,133.81 : 325,864.91 = 128,703.93 : x
  2. Step 2: Convert to fraction form
    236,133.81/325,864.91 = 128,703.93/x
  3. Step 3: Cross multiply
    236,133.81x = 325,864.91 × 128,703.93
  4. Step 4: Simplify right side
    236,133.81x = 41,940,094,566.10
  5. Step 5: Solve for x
    x = 41,940,094,566.10/236,133.81
  6. Step 6: Final answer
    x = 177,611.56

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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.