Home / 81,656.10-121,936.59-81,262.44

Finding the Fourth Proportional to 81,656.10, 121,936.59 and 81,262.44

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Solution

The fourth proportional to 81,656.10, 121,936.59 and 81,262.44 is: 121,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.10 : 121,936.59 = 81,262.44 : x
  2. Step 2: Convert to fraction form
    81,656.10/121,936.59 = 81,262.44/x
  3. Step 3: Cross multiply
    81,656.10x = 121,936.59 × 81,262.44
  4. Step 4: Simplify right side
    81,656.10x = 9,908,864,828.68
  5. Step 5: Solve for x
    x = 9,908,864,828.68/81,656.10
  6. Step 6: Final answer
    x = 121,348.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.