Home / 326,128.20-489,139.86-89,415.96

Finding the Fourth Proportional to 326,128.20, 489,139.86 and 89,415.96

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Solution

The fourth proportional to 326,128.20, 489,139.86 and 89,415.96 is: 134,109.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,128.20 : 489,139.86 = 89,415.96 : x
  2. Step 2: Convert to fraction form
    326,128.20/489,139.86 = 89,415.96/x
  3. Step 3: Cross multiply
    326,128.20x = 489,139.86 × 89,415.96
  4. Step 4: Simplify right side
    326,128.20x = 43,736,910,156.17
  5. Step 5: Solve for x
    x = 43,736,910,156.17/326,128.20
  6. Step 6: Final answer
    x = 134,109.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.