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Finding the Fourth Proportional to 103,438.73, 155,155.01 and 28,563.45

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Solution

The fourth proportional to 103,438.73, 155,155.01 and 28,563.45 is: 42,844.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,438.73 : 155,155.01 = 28,563.45 : x
  2. Step 2: Convert to fraction form
    103,438.73/155,155.01 = 28,563.45/x
  3. Step 3: Cross multiply
    103,438.73x = 155,155.01 × 28,563.45
  4. Step 4: Simplify right side
    103,438.73x = 4,431,762,370.38
  5. Step 5: Solve for x
    x = 4,431,762,370.38/103,438.73
  6. Step 6: Final answer
    x = 42,844.32

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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.