Home / 103,758.15-155,777.15-66,391.16

Finding the Fourth Proportional to 103,758.15, 155,777.15 and 66,391.16

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Solution

The fourth proportional to 103,758.15, 155,777.15 and 66,391.16 is: 99,676.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,758.15 : 155,777.15 = 66,391.16 : x
  2. Step 2: Convert to fraction form
    103,758.15/155,777.15 = 66,391.16/x
  3. Step 3: Cross multiply
    103,758.15x = 155,777.15 × 66,391.16
  4. Step 4: Simplify right side
    103,758.15x = 10,342,224,579.15
  5. Step 5: Solve for x
    x = 10,342,224,579.15/103,758.15
  6. Step 6: Final answer
    x = 99,676.27

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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.