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Finding the Fourth Proportional to 187,207.65, 280,653.53 and 87,315.21

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Solution

The fourth proportional to 187,207.65, 280,653.53 and 87,315.21 is: 130,899.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,207.65 : 280,653.53 = 87,315.21 : x
  2. Step 2: Convert to fraction form
    187,207.65/280,653.53 = 87,315.21/x
  3. Step 3: Cross multiply
    187,207.65x = 280,653.53 × 87,315.21
  4. Step 4: Simplify right side
    187,207.65x = 24,505,321,472.62
  5. Step 5: Solve for x
    x = 24,505,321,472.62/187,207.65
  6. Step 6: Final answer
    x = 130,899.15

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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.