Home / 102,780.50-142,021.96-80,176.64

Finding the Fourth Proportional to 102,780.50, 142,021.96 and 80,176.64

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Solution

The fourth proportional to 102,780.50, 142,021.96 and 80,176.64 is: 110,787.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,780.50 : 142,021.96 = 80,176.64 : x
  2. Step 2: Convert to fraction form
    102,780.50/142,021.96 = 80,176.64/x
  3. Step 3: Cross multiply
    102,780.50x = 142,021.96 × 80,176.64
  4. Step 4: Simplify right side
    102,780.50x = 11,386,842,648.46
  5. Step 5: Solve for x
    x = 11,386,842,648.46/102,780.50
  6. Step 6: Final answer
    x = 110,787.97

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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.