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Finding the Fourth Proportional to 103,433.61, 155,147.32 and 28,558.33

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Solution

The fourth proportional to 103,433.61, 155,147.32 and 28,558.33 is: 42,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,433.61 : 155,147.32 = 28,558.33 : x
  2. Step 2: Convert to fraction form
    103,433.61/155,147.32 = 28,558.33/x
  3. Step 3: Cross multiply
    103,433.61x = 155,147.32 × 28,558.33
  4. Step 4: Simplify right side
    103,433.61x = 4,430,748,220.38
  5. Step 5: Solve for x
    x = 4,430,748,220.38/103,433.61
  6. Step 6: Final answer
    x = 42,836.64

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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.