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Finding the Fourth Proportional to 143,670.13, 215,311.44 and 72,642.88

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Solution

The fourth proportional to 143,670.13, 215,311.44 and 72,642.88 is: 108,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,670.13 : 215,311.44 = 72,642.88 : x
  2. Step 2: Convert to fraction form
    143,670.13/215,311.44 = 72,642.88/x
  3. Step 3: Cross multiply
    143,670.13x = 215,311.44 × 72,642.88
  4. Step 4: Simplify right side
    143,670.13x = 15,640,842,224.66
  5. Step 5: Solve for x
    x = 15,640,842,224.66/143,670.13
  6. Step 6: Final answer
    x = 108,866.35

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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.