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Finding the Fourth Proportional to 318,293.33, 477,440.13 and 81,636.01

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Solution

The fourth proportional to 318,293.33, 477,440.13 and 81,636.01 is: 122,454.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,293.33 : 477,440.13 = 81,636.01 : x
  2. Step 2: Convert to fraction form
    318,293.33/477,440.13 = 81,636.01/x
  3. Step 3: Cross multiply
    318,293.33x = 477,440.13 × 81,636.01
  4. Step 4: Simplify right side
    318,293.33x = 38,976,307,525.86
  5. Step 5: Solve for x
    x = 38,976,307,525.86/318,293.33
  6. Step 6: Final answer
    x = 122,454.05

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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.