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Finding the Fourth Proportional to 253,169.35, 349,359.28 and 138,426.57

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Solution

The fourth proportional to 253,169.35, 349,359.28 and 138,426.57 is: 191,020.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,169.35 : 349,359.28 = 138,426.57 : x
  2. Step 2: Convert to fraction form
    253,169.35/349,359.28 = 138,426.57/x
  3. Step 3: Cross multiply
    253,169.35x = 349,359.28 × 138,426.57
  4. Step 4: Simplify right side
    253,169.35x = 48,360,606,482.00
  5. Step 5: Solve for x
    x = 48,360,606,482.00/253,169.35
  6. Step 6: Final answer
    x = 191,020.78

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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.