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Finding the Fourth Proportional to 93,876, 129,528.72 and 55,647.60

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Solution

The fourth proportional to 93,876, 129,528.72 and 55,647.60 is: 76,781.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,876 : 129,528.72 = 55,647.60 : x
  2. Step 2: Convert to fraction form
    93,876/129,528.72 = 55,647.60/x
  3. Step 3: Cross multiply
    93,876x = 129,528.72 × 55,647.60
  4. Step 4: Simplify right side
    93,876x = 7,207,962,399.07
  5. Step 5: Solve for x
    x = 7,207,962,399.07/93,876
  6. Step 6: Final answer
    x = 76,781.74

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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.