Home / 326,129.20-489,141.36-89,416.96

Finding the Fourth Proportional to 326,129.20, 489,141.36 and 89,416.96

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Solution

The fourth proportional to 326,129.20, 489,141.36 and 89,416.96 is: 134,111.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,129.20 : 489,141.36 = 89,416.96 : x
  2. Step 2: Convert to fraction form
    326,129.20/489,141.36 = 89,416.96/x
  3. Step 3: Cross multiply
    326,129.20x = 489,141.36 × 89,416.96
  4. Step 4: Simplify right side
    326,129.20x = 43,737,533,421.47
  5. Step 5: Solve for x
    x = 43,737,533,421.47/326,129.20
  6. Step 6: Final answer
    x = 134,111.06

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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.