Home / 78,181.20-107,890.14-42,371.21

Finding the Fourth Proportional to 78,181.20, 107,890.14 and 42,371.21

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Solution

The fourth proportional to 78,181.20, 107,890.14 and 42,371.21 is: 58,472.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,181.20 : 107,890.14 = 42,371.21 : x
  2. Step 2: Convert to fraction form
    78,181.20/107,890.14 = 42,371.21/x
  3. Step 3: Cross multiply
    78,181.20x = 107,890.14 × 42,371.21
  4. Step 4: Simplify right side
    78,181.20x = 4,571,435,239.42
  5. Step 5: Solve for x
    x = 4,571,435,239.42/78,181.20
  6. Step 6: Final answer
    x = 58,472.31

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1.5x scale

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.