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Finding the Fourth Proportional to 251,423.30, 346,963.02 and 138,245.78

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Solution

The fourth proportional to 251,423.30, 346,963.02 and 138,245.78 is: 190,778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,423.30 : 346,963.02 = 138,245.78 : x
  2. Step 2: Convert to fraction form
    251,423.30/346,963.02 = 138,245.78/x
  3. Step 3: Cross multiply
    251,423.30x = 346,963.02 × 138,245.78
  4. Step 4: Simplify right side
    251,423.30x = 47,966,173,331.06
  5. Step 5: Solve for x
    x = 47,966,173,331.06/251,423.30
  6. Step 6: Final answer
    x = 190,778.55

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1.5x scale

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.