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Finding the Fourth Proportional to 93,870, 129,520.44 and 55,641.60

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Solution

The fourth proportional to 93,870, 129,520.44 and 55,641.60 is: 76,773.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,870 : 129,520.44 = 55,641.60 : x
  2. Step 2: Convert to fraction form
    93,870/129,520.44 = 55,641.60/x
  3. Step 3: Cross multiply
    93,870x = 129,520.44 × 55,641.60
  4. Step 4: Simplify right side
    93,870x = 7,206,724,514.30
  5. Step 5: Solve for x
    x = 7,206,724,514.30/93,870
  6. Step 6: Final answer
    x = 76,773.46

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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.