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Finding the Fourth Proportional to 115,312.66, 172,954.66 and 31,079.41

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Solution

The fourth proportional to 115,312.66, 172,954.66 and 31,079.41 is: 46,615.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,312.66 : 172,954.66 = 31,079.41 : x
  2. Step 2: Convert to fraction form
    115,312.66/172,954.66 = 31,079.41/x
  3. Step 3: Cross multiply
    115,312.66x = 172,954.66 × 31,079.41
  4. Step 4: Simplify right side
    115,312.66x = 5,375,328,789.55
  5. Step 5: Solve for x
    x = 5,375,328,789.55/115,312.66
  6. Step 6: Final answer
    x = 46,615.25

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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.