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Finding the Fourth Proportional to 115,225.67, 172,719.74 and 44,128.90

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Solution

The fourth proportional to 115,225.67, 172,719.74 and 44,128.90 is: 66,147.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,225.67 : 172,719.74 = 44,128.90 : x
  2. Step 2: Convert to fraction form
    115,225.67/172,719.74 = 44,128.90/x
  3. Step 3: Cross multiply
    115,225.67x = 172,719.74 × 44,128.90
  4. Step 4: Simplify right side
    115,225.67x = 7,621,932,460.71
  5. Step 5: Solve for x
    x = 7,621,932,460.71/115,225.67
  6. Step 6: Final answer
    x = 66,147.87

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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.