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Finding the Fourth Proportional to 103,720.46, 155,629.13 and 53,773.34

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Solution

The fourth proportional to 103,720.46, 155,629.13 and 53,773.34 is: 80,685.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,720.46 : 155,629.13 = 53,773.34 : x
  2. Step 2: Convert to fraction form
    103,720.46/155,629.13 = 53,773.34/x
  3. Step 3: Cross multiply
    103,720.46x = 155,629.13 × 53,773.34
  4. Step 4: Simplify right side
    103,720.46x = 8,368,697,074.38
  5. Step 5: Solve for x
    x = 8,368,697,074.38/103,720.46
  6. Step 6: Final answer
    x = 80,685.12

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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.