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Finding the Fourth Proportional to 115,530.80, 172,950.60 and 108,695.60

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Solution

The fourth proportional to 115,530.80, 172,950.60 and 108,695.60 is: 162,718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,530.80 : 172,950.60 = 108,695.60 : x
  2. Step 2: Convert to fraction form
    115,530.80/172,950.60 = 108,695.60/x
  3. Step 3: Cross multiply
    115,530.80x = 172,950.60 × 108,695.60
  4. Step 4: Simplify right side
    115,530.80x = 18,798,969,237.36
  5. Step 5: Solve for x
    x = 18,798,969,237.36/115,530.80
  6. Step 6: Final answer
    x = 162,718.25

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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.