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Finding the Fourth Proportional to 187,145.45, 280,643.45 and 108,315.03

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Solution

The fourth proportional to 187,145.45, 280,643.45 and 108,315.03 is: 162,429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,145.45 : 280,643.45 = 108,315.03 : x
  2. Step 2: Convert to fraction form
    187,145.45/280,643.45 = 108,315.03/x
  3. Step 3: Cross multiply
    187,145.45x = 280,643.45 × 108,315.03
  4. Step 4: Simplify right side
    187,145.45x = 30,397,903,164.48
  5. Step 5: Solve for x
    x = 30,397,903,164.48/187,145.45
  6. Step 6: Final answer
    x = 162,429.30

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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.