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Finding the Fourth Proportional to 115,290.70, 172,960.35 and 48,696.55

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Solution

The fourth proportional to 115,290.70, 172,960.35 and 48,696.55 is: 73,055.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,290.70 : 172,960.35 = 48,696.55 : x
  2. Step 2: Convert to fraction form
    115,290.70/172,960.35 = 48,696.55/x
  3. Step 3: Cross multiply
    115,290.70x = 172,960.35 × 48,696.55
  4. Step 4: Simplify right side
    115,290.70x = 8,422,572,331.79
  5. Step 5: Solve for x
    x = 8,422,572,331.79/115,290.70
  6. Step 6: Final answer
    x = 73,055.09

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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.