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Finding the Fourth Proportional to 213,668.51, 320,750.21 and 124,985.66

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Solution

The fourth proportional to 213,668.51, 320,750.21 and 124,985.66 is: 187,623.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,668.51 : 320,750.21 = 124,985.66 : x
  2. Step 2: Convert to fraction form
    213,668.51/320,750.21 = 124,985.66/x
  3. Step 3: Cross multiply
    213,668.51x = 320,750.21 × 124,985.66
  4. Step 4: Simplify right side
    213,668.51x = 40,089,174,463.31
  5. Step 5: Solve for x
    x = 40,089,174,463.31/213,668.51
  6. Step 6: Final answer
    x = 187,623.23

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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.