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Finding the Fourth Proportional to 103,765.50, 143,142.23 and 65,511.29

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Solution

The fourth proportional to 103,765.50, 143,142.23 and 65,511.29 is: 90,371.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,765.50 : 143,142.23 = 65,511.29 : x
  2. Step 2: Convert to fraction form
    103,765.50/143,142.23 = 65,511.29/x
  3. Step 3: Cross multiply
    103,765.50x = 143,142.23 × 65,511.29
  4. Step 4: Simplify right side
    103,765.50x = 9,377,432,662.41
  5. Step 5: Solve for x
    x = 9,377,432,662.41/103,765.50
  6. Step 6: Final answer
    x = 90,371.39

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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.