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Finding the Fourth Proportional to 115,272.88, 172,573.04 and 70,764.72

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Solution

The fourth proportional to 115,272.88, 172,573.04 and 70,764.72 is: 105,940.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,272.88 : 172,573.04 = 70,764.72 : x
  2. Step 2: Convert to fraction form
    115,272.88/172,573.04 = 70,764.72/x
  3. Step 3: Cross multiply
    115,272.88x = 172,573.04 × 70,764.72
  4. Step 4: Simplify right side
    115,272.88x = 12,212,082,855.15
  5. Step 5: Solve for x
    x = 12,212,082,855.15/115,272.88
  6. Step 6: Final answer
    x = 105,940.64

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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.