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Finding the Fourth Proportional to 339,995.21, 510,066.18 and 103,356.95

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Solution

The fourth proportional to 339,995.21, 510,066.18 and 103,356.95 is: 155,057.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,995.21 : 510,066.18 = 103,356.95 : x
  2. Step 2: Convert to fraction form
    339,995.21/510,066.18 = 103,356.95/x
  3. Step 3: Cross multiply
    339,995.21x = 510,066.18 × 103,356.95
  4. Step 4: Simplify right side
    339,995.21x = 52,718,884,662.95
  5. Step 5: Solve for x
    x = 52,718,884,662.95/339,995.21
  6. Step 6: Final answer
    x = 155,057.73

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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.