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Finding the Fourth Proportional to 262,020.89, 393,009.40 and 72,483.59

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Solution

The fourth proportional to 262,020.89, 393,009.40 and 72,483.59 is: 108,719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,020.89 : 393,009.40 = 72,483.59 : x
  2. Step 2: Convert to fraction form
    262,020.89/393,009.40 = 72,483.59/x
  3. Step 3: Cross multiply
    262,020.89x = 393,009.40 × 72,483.59
  4. Step 4: Simplify right side
    262,020.89x = 28,486,733,288.87
  5. Step 5: Solve for x
    x = 28,486,733,288.87/262,020.89
  6. Step 6: Final answer
    x = 108,719.32

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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.