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Finding the Fourth Proportional to 235,516.76, 325,015.48 and 128,089.20

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Solution

The fourth proportional to 235,516.76, 325,015.48 and 128,089.20 is: 176,764.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,516.76 : 325,015.48 = 128,089.20 : x
  2. Step 2: Convert to fraction form
    235,516.76/325,015.48 = 128,089.20/x
  3. Step 3: Cross multiply
    235,516.76x = 325,015.48 × 128,089.20
  4. Step 4: Simplify right side
    235,516.76x = 41,630,972,820.82
  5. Step 5: Solve for x
    x = 41,630,972,820.82/235,516.76
  6. Step 6: Final answer
    x = 176,764.37

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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.