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Finding the Fourth Proportional to 103,810.60, 155,715.90 and 83,074.60

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Solution

The fourth proportional to 103,810.60, 155,715.90 and 83,074.60 is: 124,611.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,810.60 : 155,715.90 = 83,074.60 : x
  2. Step 2: Convert to fraction form
    103,810.60/155,715.90 = 83,074.60/x
  3. Step 3: Cross multiply
    103,810.60x = 155,715.90 × 83,074.60
  4. Step 4: Simplify right side
    103,810.60x = 12,936,036,106.14
  5. Step 5: Solve for x
    x = 12,936,036,106.14/103,810.60
  6. Step 6: Final answer
    x = 124,611.90

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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.