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Finding the Fourth Proportional to 253,632.71, 350,013.26 and 138,918.58

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Solution

The fourth proportional to 253,632.71, 350,013.26 and 138,918.58 is: 191,707.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,632.71 : 350,013.26 = 138,918.58 : x
  2. Step 2: Convert to fraction form
    253,632.71/350,013.26 = 138,918.58/x
  3. Step 3: Cross multiply
    253,632.71x = 350,013.26 × 138,918.58
  4. Step 4: Simplify right side
    253,632.71x = 48,623,345,765.06
  5. Step 5: Solve for x
    x = 48,623,345,765.06/253,632.71
  6. Step 6: Final answer
    x = 191,707.71

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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.