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Finding the Fourth Proportional to 245,722.68, 339,041.20 and 138,253.50

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Solution

The fourth proportional to 245,722.68, 339,041.20 and 138,253.50 is: 190,758.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,722.68 : 339,041.20 = 138,253.50 : x
  2. Step 2: Convert to fraction form
    245,722.68/339,041.20 = 138,253.50/x
  3. Step 3: Cross multiply
    245,722.68x = 339,041.20 × 138,253.50
  4. Step 4: Simplify right side
    245,722.68x = 46,873,631,309.82
  5. Step 5: Solve for x
    x = 46,873,631,309.82/245,722.68
  6. Step 6: Final answer
    x = 190,758.26

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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.