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Finding the Fourth Proportional to 103,636.56, 143,013 and 61,179.60

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Solution

The fourth proportional to 103,636.56, 143,013 and 61,179.60 is: 84,424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.56 : 143,013 = 61,179.60 : x
  2. Step 2: Convert to fraction form
    103,636.56/143,013 = 61,179.60/x
  3. Step 3: Cross multiply
    103,636.56x = 143,013 × 61,179.60
  4. Step 4: Simplify right side
    103,636.56x = 8,749,478,134.80
  5. Step 5: Solve for x
    x = 8,749,478,134.80/103,636.56
  6. Step 6: Final answer
    x = 84,424.63

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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.