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Finding the Fourth Proportional to 251,494.92, 347,063.54 and 138,315.40

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Solution

The fourth proportional to 251,494.92, 347,063.54 and 138,315.40 is: 190,875.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,494.92 : 347,063.54 = 138,315.40 : x
  2. Step 2: Convert to fraction form
    251,494.92/347,063.54 = 138,315.40/x
  3. Step 3: Cross multiply
    251,494.92x = 347,063.54 × 138,315.40
  4. Step 4: Simplify right side
    251,494.92x = 48,004,232,360.52
  5. Step 5: Solve for x
    x = 48,004,232,360.52/251,494.92
  6. Step 6: Final answer
    x = 190,875.55

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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.