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Finding the Fourth Proportional to 104,508.68, 144,219.60 and 56,761

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Solution

The fourth proportional to 104,508.68, 144,219.60 and 56,761 is: 78,328.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,508.68 : 144,219.60 = 56,761 : x
  2. Step 2: Convert to fraction form
    104,508.68/144,219.60 = 56,761/x
  3. Step 3: Cross multiply
    104,508.68x = 144,219.60 × 56,761
  4. Step 4: Simplify right side
    104,508.68x = 8,186,048,715.60
  5. Step 5: Solve for x
    x = 8,186,048,715.60/104,508.68
  6. Step 6: Final answer
    x = 78,328.89

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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.