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Finding the Fourth Proportional to 235,637.21, 325,169.63 and 128,207.67

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Solution

The fourth proportional to 235,637.21, 325,169.63 and 128,207.67 is: 176,921.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,637.21 : 325,169.63 = 128,207.67 : x
  2. Step 2: Convert to fraction form
    235,637.21/325,169.63 = 128,207.67/x
  3. Step 3: Cross multiply
    235,637.21x = 325,169.63 × 128,207.67
  4. Step 4: Simplify right side
    235,637.21x = 41,689,239,976.02
  5. Step 5: Solve for x
    x = 41,689,239,976.02/235,637.21
  6. Step 6: Final answer
    x = 176,921.30

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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.