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Finding the Fourth Proportional to 245,655.91, 339,001.23 and 138,225.88

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Solution

The fourth proportional to 245,655.91, 339,001.23 and 138,225.88 is: 190,749.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,655.91 : 339,001.23 = 138,225.88 : x
  2. Step 2: Convert to fraction form
    245,655.91/339,001.23 = 138,225.88/x
  3. Step 3: Cross multiply
    245,655.91x = 339,001.23 × 138,225.88
  4. Step 4: Simplify right side
    245,655.91x = 46,858,743,337.83
  5. Step 5: Solve for x
    x = 46,858,743,337.83/245,655.91
  6. Step 6: Final answer
    x = 190,749.51

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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.