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Finding the Fourth Proportional to 81,780.48, 122,670.72 and 26,376.48

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Solution

The fourth proportional to 81,780.48, 122,670.72 and 26,376.48 is: 39,564.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.48 : 122,670.72 = 26,376.48 : x
  2. Step 2: Convert to fraction form
    81,780.48/122,670.72 = 26,376.48/x
  3. Step 3: Cross multiply
    81,780.48x = 122,670.72 × 26,376.48
  4. Step 4: Simplify right side
    81,780.48x = 3,235,621,792.67
  5. Step 5: Solve for x
    x = 3,235,621,792.67/81,780.48
  6. Step 6: Final answer
    x = 39,564.72

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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.