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Finding the Fourth Proportional to 100,671.43, 151,123.80 and 54,015.43

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Solution

The fourth proportional to 100,671.43, 151,123.80 and 54,015.43 is: 81,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,671.43 : 151,123.80 = 54,015.43 : x
  2. Step 2: Convert to fraction form
    100,671.43/151,123.80 = 54,015.43/x
  3. Step 3: Cross multiply
    100,671.43x = 151,123.80 × 54,015.43
  4. Step 4: Simplify right side
    100,671.43x = 8,163,017,040.23
  5. Step 5: Solve for x
    x = 8,163,017,040.23/100,671.43
  6. Step 6: Final answer
    x = 81,085.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.