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Finding the Fourth Proportional to 356,143.82, 534,243.51 and 103,428.45

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Solution

The fourth proportional to 356,143.82, 534,243.51 and 103,428.45 is: 155,150.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,143.82 : 534,243.51 = 103,428.45 : x
  2. Step 2: Convert to fraction form
    356,143.82/534,243.51 = 103,428.45/x
  3. Step 3: Cross multiply
    356,143.82x = 534,243.51 × 103,428.45
  4. Step 4: Simplify right side
    356,143.82x = 55,255,978,161.86
  5. Step 5: Solve for x
    x = 55,255,978,161.86/356,143.82
  6. Step 6: Final answer
    x = 155,150.74

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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.