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Finding the Fourth Proportional to 55,560, 76,672.80 and 30,409.50

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Solution

The fourth proportional to 55,560, 76,672.80 and 30,409.50 is: 41,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,560 : 76,672.80 = 30,409.50 : x
  2. Step 2: Convert to fraction form
    55,560/76,672.80 = 30,409.50/x
  3. Step 3: Cross multiply
    55,560x = 76,672.80 × 30,409.50
  4. Step 4: Simplify right side
    55,560x = 2,331,581,511.60
  5. Step 5: Solve for x
    x = 2,331,581,511.60/55,560
  6. Step 6: Final answer
    x = 41,965.11

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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.