Home / 142,787.56-197,044.47-78,256.30

Finding the Fourth Proportional to 142,787.56, 197,044.47 and 78,256.30

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Solution

The fourth proportional to 142,787.56, 197,044.47 and 78,256.30 is: 107,992.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,787.56 : 197,044.47 = 78,256.30 : x
  2. Step 2: Convert to fraction form
    142,787.56/197,044.47 = 78,256.30/x
  3. Step 3: Cross multiply
    142,787.56x = 197,044.47 × 78,256.30
  4. Step 4: Simplify right side
    142,787.56x = 15,419,971,157.66
  5. Step 5: Solve for x
    x = 15,419,971,157.66/142,787.56
  6. Step 6: Final answer
    x = 107,992.40

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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.