Home / 66,787.19-100,157.70-19,389.42

Finding the Fourth Proportional to 66,787.19, 100,157.70 and 19,389.42

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Solution

The fourth proportional to 66,787.19, 100,157.70 and 19,389.42 is: 29,077.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,787.19 : 100,157.70 = 19,389.42 : x
  2. Step 2: Convert to fraction form
    66,787.19/100,157.70 = 19,389.42/x
  3. Step 3: Cross multiply
    66,787.19x = 100,157.70 × 19,389.42
  4. Step 4: Simplify right side
    66,787.19x = 1,941,999,711.53
  5. Step 5: Solve for x
    x = 1,941,999,711.53/66,787.19
  6. Step 6: Final answer
    x = 29,077.43

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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.