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Finding the Fourth Proportional to 251,009.48, 346,393.50 and 137,839.40

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Solution

The fourth proportional to 251,009.48, 346,393.50 and 137,839.40 is: 190,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,009.48 : 346,393.50 = 137,839.40 : x
  2. Step 2: Convert to fraction form
    251,009.48/346,393.50 = 137,839.40/x
  3. Step 3: Cross multiply
    251,009.48x = 346,393.50 × 137,839.40
  4. Step 4: Simplify right side
    251,009.48x = 47,746,672,203.90
  5. Step 5: Solve for x
    x = 47,746,672,203.90/251,009.48
  6. Step 6: Final answer
    x = 190,218.60

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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.