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Finding the Fourth Proportional to 253,100.21, 349,263.29 and 139,916.21

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Solution

The fourth proportional to 253,100.21, 349,263.29 and 139,916.21 is: 193,076.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,100.21 : 349,263.29 = 139,916.21 : x
  2. Step 2: Convert to fraction form
    253,100.21/349,263.29 = 139,916.21/x
  3. Step 3: Cross multiply
    253,100.21x = 349,263.29 × 139,916.21
  4. Step 4: Simplify right side
    253,100.21x = 48,867,594,432.41
  5. Step 5: Solve for x
    x = 48,867,594,432.41/253,100.21
  6. Step 6: Final answer
    x = 193,076.08

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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.