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Finding the Fourth Proportional to 251,209.84, 346,669.48 and 138,039.88

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Solution

The fourth proportional to 251,209.84, 346,669.48 and 138,039.88 is: 190,494.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,209.84 : 346,669.48 = 138,039.88 : x
  2. Step 2: Convert to fraction form
    251,209.84/346,669.48 = 138,039.88/x
  3. Step 3: Cross multiply
    251,209.84x = 346,669.48 × 138,039.88
  4. Step 4: Simplify right side
    251,209.84x = 47,854,213,418.86
  5. Step 5: Solve for x
    x = 47,854,213,418.86/251,209.84
  6. Step 6: Final answer
    x = 190,494.98

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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.