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Finding the Fourth Proportional to 103,871.77, 143,311.17 and 63,543.49

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Solution

The fourth proportional to 103,871.77, 143,311.17 and 63,543.49 is: 87,670.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,871.77 : 143,311.17 = 63,543.49 : x
  2. Step 2: Convert to fraction form
    103,871.77/143,311.17 = 63,543.49/x
  3. Step 3: Cross multiply
    103,871.77x = 143,311.17 × 63,543.49
  4. Step 4: Simplify right side
    103,871.77x = 9,106,491,777.79
  5. Step 5: Solve for x
    x = 9,106,491,777.79/103,871.77
  6. Step 6: Final answer
    x = 87,670.52

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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.