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Finding the Fourth Proportional to 251,468.15, 347,019.12 and 138,290.90

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Solution

The fourth proportional to 251,468.15, 347,019.12 and 138,290.90 is: 190,837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,468.15 : 347,019.12 = 138,290.90 : x
  2. Step 2: Convert to fraction form
    251,468.15/347,019.12 = 138,290.90/x
  3. Step 3: Cross multiply
    251,468.15x = 347,019.12 × 138,290.90
  4. Step 4: Simplify right side
    251,468.15x = 47,989,584,686.91
  5. Step 5: Solve for x
    x = 47,989,584,686.91/251,468.15
  6. Step 6: Final answer
    x = 190,837.63

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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.