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Finding the Fourth Proportional to 103,455.79, 155,180.57 and 28,580.41

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Solution

The fourth proportional to 103,455.79, 155,180.57 and 28,580.41 is: 42,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,455.79 : 155,180.57 = 28,580.41 : x
  2. Step 2: Convert to fraction form
    103,455.79/155,180.57 = 28,580.41/x
  3. Step 3: Cross multiply
    103,455.79x = 155,180.57 × 28,580.41
  4. Step 4: Simplify right side
    103,455.79x = 4,435,124,314.63
  5. Step 5: Solve for x
    x = 4,435,124,314.63/103,455.79
  6. Step 6: Final answer
    x = 42,869.75

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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.