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Finding the Fourth Proportional to 125,270.90, 172,866.40 and 74,288.44

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Solution

The fourth proportional to 125,270.90, 172,866.40 and 74,288.44 is: 102,513.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,270.90 : 172,866.40 = 74,288.44 : x
  2. Step 2: Convert to fraction form
    125,270.90/172,866.40 = 74,288.44/x
  3. Step 3: Cross multiply
    125,270.90x = 172,866.40 × 74,288.44
  4. Step 4: Simplify right side
    125,270.90x = 12,841,975,632.65
  5. Step 5: Solve for x
    x = 12,841,975,632.65/125,270.90
  6. Step 6: Final answer
    x = 102,513.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.