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Finding the Fourth Proportional to 103,903, 143,463 and 63,671.74

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Solution

The fourth proportional to 103,903, 143,463 and 63,671.74 is: 87,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,903 : 143,463 = 63,671.74 : x
  2. Step 2: Convert to fraction form
    103,903/143,463 = 63,671.74/x
  3. Step 3: Cross multiply
    103,903x = 143,463 × 63,671.74
  4. Step 4: Simplify right side
    103,903x = 9,134,538,835.62
  5. Step 5: Solve for x
    x = 9,134,538,835.62/103,903
  6. Step 6: Final answer
    x = 87,914.10

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1.5x scale

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.