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Finding the Fourth Proportional to 45,672.31, 68,674.99 and 42,018.65

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Solution

The fourth proportional to 45,672.31, 68,674.99 and 42,018.65 is: 63,181.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,672.31 : 68,674.99 = 42,018.65 : x
  2. Step 2: Convert to fraction form
    45,672.31/68,674.99 = 42,018.65/x
  3. Step 3: Cross multiply
    45,672.31x = 68,674.99 × 42,018.65
  4. Step 4: Simplify right side
    45,672.31x = 2,885,630,256.46
  5. Step 5: Solve for x
    x = 2,885,630,256.46/45,672.31
  6. Step 6: Final answer
    x = 63,181.18

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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.