Home / 103,636.10-155,454.15-71,979.28

Finding the Fourth Proportional to 103,636.10, 155,454.15 and 71,979.28

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Solution

The fourth proportional to 103,636.10, 155,454.15 and 71,979.28 is: 107,968.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.10 : 155,454.15 = 71,979.28 : x
  2. Step 2: Convert to fraction form
    103,636.10/155,454.15 = 71,979.28/x
  3. Step 3: Cross multiply
    103,636.10x = 155,454.15 × 71,979.28
  4. Step 4: Simplify right side
    103,636.10x = 11,189,477,790.01
  5. Step 5: Solve for x
    x = 11,189,477,790.01/103,636.10
  6. Step 6: Final answer
    x = 107,968.92

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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.