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Finding the Fourth Proportional to 236,142.65, 325,880.15 and 128,712.49

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Solution

The fourth proportional to 236,142.65, 325,880.15 and 128,712.49 is: 177,625.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,142.65 : 325,880.15 = 128,712.49 : x
  2. Step 2: Convert to fraction form
    236,142.65/325,880.15 = 128,712.49/x
  3. Step 3: Cross multiply
    236,142.65x = 325,880.15 × 128,712.49
  4. Step 4: Simplify right side
    236,142.65x = 41,944,844,089.81
  5. Step 5: Solve for x
    x = 41,944,844,089.81/236,142.65
  6. Step 6: Final answer
    x = 177,625.02

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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.