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Finding the Fourth Proportional to 103,549.87, 142,909.64 and 63,290.44

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Solution

The fourth proportional to 103,549.87, 142,909.64 and 63,290.44 is: 87,347.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,549.87 : 142,909.64 = 63,290.44 : x
  2. Step 2: Convert to fraction form
    103,549.87/142,909.64 = 63,290.44/x
  3. Step 3: Cross multiply
    103,549.87x = 142,909.64 × 63,290.44
  4. Step 4: Simplify right side
    103,549.87x = 9,044,813,995.84
  5. Step 5: Solve for x
    x = 9,044,813,995.84/103,549.87
  6. Step 6: Final answer
    x = 87,347.42

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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.