Home / 81,685.51-122,535.84-31,769.36

Finding the Fourth Proportional to 81,685.51, 122,535.84 and 31,769.36

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Solution

The fourth proportional to 81,685.51, 122,535.84 and 31,769.36 is: 47,656.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,685.51 : 122,535.84 = 31,769.36 : x
  2. Step 2: Convert to fraction form
    81,685.51/122,535.84 = 31,769.36/x
  3. Step 3: Cross multiply
    81,685.51x = 122,535.84 × 31,769.36
  4. Step 4: Simplify right side
    81,685.51x = 3,892,885,690.39
  5. Step 5: Solve for x
    x = 3,892,885,690.39/81,685.51
  6. Step 6: Final answer
    x = 47,656.99

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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.