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Finding the Fourth Proportional to 115,886.94, 172,961.60 and 108,320.12

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Solution

The fourth proportional to 115,886.94, 172,961.60 and 108,320.12 is: 161,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,886.94 : 172,961.60 = 108,320.12 : x
  2. Step 2: Convert to fraction form
    115,886.94/172,961.60 = 108,320.12/x
  3. Step 3: Cross multiply
    115,886.94x = 172,961.60 × 108,320.12
  4. Step 4: Simplify right side
    115,886.94x = 18,735,220,509.59
  5. Step 5: Solve for x
    x = 18,735,220,509.59/115,886.94
  6. Step 6: Final answer
    x = 161,668.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.