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Finding the Fourth Proportional to 104,172.55, 155,813.83 and 86,970.89

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Solution

The fourth proportional to 104,172.55, 155,813.83 and 86,970.89 is: 130,084.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,172.55 : 155,813.83 = 86,970.89 : x
  2. Step 2: Convert to fraction form
    104,172.55/155,813.83 = 86,970.89/x
  3. Step 3: Cross multiply
    104,172.55x = 155,813.83 × 86,970.89
  4. Step 4: Simplify right side
    104,172.55x = 13,551,267,469.41
  5. Step 5: Solve for x
    x = 13,551,267,469.41/104,172.55
  6. Step 6: Final answer
    x = 130,084.82

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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.