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Finding the Fourth Proportional to 251,361.72, 346,870.35 and 138,183.66

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Solution

The fourth proportional to 251,361.72, 346,870.35 and 138,183.66 is: 190,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,361.72 : 346,870.35 = 138,183.66 : x
  2. Step 2: Convert to fraction form
    251,361.72/346,870.35 = 138,183.66/x
  3. Step 3: Cross multiply
    251,361.72x = 346,870.35 × 138,183.66
  4. Step 4: Simplify right side
    251,361.72x = 47,931,814,508.48
  5. Step 5: Solve for x
    x = 47,931,814,508.48/251,361.72
  6. Step 6: Final answer
    x = 190,688.60

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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.