Home / 81,780.49-122,670.58-25,624.89

Finding the Fourth Proportional to 81,780.49, 122,670.58 and 25,624.89

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Solution

The fourth proportional to 81,780.49, 122,670.58 and 25,624.89 is: 38,437.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.49 : 122,670.58 = 25,624.89 : x
  2. Step 2: Convert to fraction form
    81,780.49/122,670.58 = 25,624.89/x
  3. Step 3: Cross multiply
    81,780.49x = 122,670.58 × 25,624.89
  4. Step 4: Simplify right side
    81,780.49x = 3,143,420,548.17
  5. Step 5: Solve for x
    x = 3,143,420,548.17/81,780.49
  6. Step 6: Final answer
    x = 38,437.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.