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Finding the Fourth Proportional to 334,438.50, 501,655.92 and 81,720.39

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Solution

The fourth proportional to 334,438.50, 501,655.92 and 81,720.39 is: 122,580.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    334,438.50 : 501,655.92 = 81,720.39 : x
  2. Step 2: Convert to fraction form
    334,438.50/501,655.92 = 81,720.39/x
  3. Step 3: Cross multiply
    334,438.50x = 501,655.92 × 81,720.39
  4. Step 4: Simplify right side
    334,438.50x = 40,995,519,002.97
  5. Step 5: Solve for x
    x = 40,995,519,002.97/334,438.50
  6. Step 6: Final answer
    x = 122,580.14

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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.