Home / 81,780.42-112,837.28-47,769.60

Finding the Fourth Proportional to 81,780.42, 112,837.28 and 47,769.60

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Solution

The fourth proportional to 81,780.42, 112,837.28 and 47,769.60 is: 65,910.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.42 : 112,837.28 = 47,769.60 : x
  2. Step 2: Convert to fraction form
    81,780.42/112,837.28 = 47,769.60/x
  3. Step 3: Cross multiply
    81,780.42x = 112,837.28 × 47,769.60
  4. Step 4: Simplify right side
    81,780.42x = 5,390,191,491.84
  5. Step 5: Solve for x
    x = 5,390,191,491.84/81,780.42
  6. Step 6: Final answer
    x = 65,910.54

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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.