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Finding the Fourth Proportional to 228,656.97, 315,556.07 and 128,055.69

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Solution

The fourth proportional to 228,656.97, 315,556.07 and 128,055.69 is: 176,722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,656.97 : 315,556.07 = 128,055.69 : x
  2. Step 2: Convert to fraction form
    228,656.97/315,556.07 = 128,055.69/x
  3. Step 3: Cross multiply
    228,656.97x = 315,556.07 × 128,055.69
  4. Step 4: Simplify right side
    228,656.97x = 40,408,749,637.26
  5. Step 5: Solve for x
    x = 40,408,749,637.26/228,656.97
  6. Step 6: Final answer
    x = 176,722.14

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1.5x scale

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.