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Finding the Fourth Proportional to 81,637.80, 122,435.10 and 25,477.80

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Solution

The fourth proportional to 81,637.80, 122,435.10 and 25,477.80 is: 38,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,637.80 : 122,435.10 = 25,477.80 : x
  2. Step 2: Convert to fraction form
    81,637.80/122,435.10 = 25,477.80/x
  3. Step 3: Cross multiply
    81,637.80x = 122,435.10 × 25,477.80
  4. Step 4: Simplify right side
    81,637.80x = 3,119,376,990.78
  5. Step 5: Solve for x
    x = 3,119,376,990.78/81,637.80
  6. Step 6: Final answer
    x = 38,209.96

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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.