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Finding the Fourth Proportional to 103,438.73, 155,289.45 and 87,954.77

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Solution

The fourth proportional to 103,438.73, 155,289.45 and 87,954.77 is: 132,043.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,438.73 : 155,289.45 = 87,954.77 : x
  2. Step 2: Convert to fraction form
    103,438.73/155,289.45 = 87,954.77/x
  3. Step 3: Cross multiply
    103,438.73x = 155,289.45 × 87,954.77
  4. Step 4: Simplify right side
    103,438.73x = 13,658,447,858.18
  5. Step 5: Solve for x
    x = 13,658,447,858.18/103,438.73
  6. Step 6: Final answer
    x = 132,043.85

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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.