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Finding the Fourth Proportional to 253,711.80, 350,118.33 and 138,989.49

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Solution

The fourth proportional to 253,711.80, 350,118.33 and 138,989.49 is: 191,803.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,711.80 : 350,118.33 = 138,989.49 : x
  2. Step 2: Convert to fraction form
    253,711.80/350,118.33 = 138,989.49/x
  3. Step 3: Cross multiply
    253,711.80x = 350,118.33 × 138,989.49
  4. Step 4: Simplify right side
    253,711.80x = 48,662,768,126.35
  5. Step 5: Solve for x
    x = 48,662,768,126.35/253,711.80
  6. Step 6: Final answer
    x = 191,803.33

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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.