Home / 124,939.84-172,473.28-79,678.56

Finding the Fourth Proportional to 124,939.84, 172,473.28 and 79,678.56

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Solution

The fourth proportional to 124,939.84, 172,473.28 and 79,678.56 is: 109,992.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,939.84 : 172,473.28 = 79,678.56 : x
  2. Step 2: Convert to fraction form
    124,939.84/172,473.28 = 79,678.56/x
  3. Step 3: Cross multiply
    124,939.84x = 172,473.28 × 79,678.56
  4. Step 4: Simplify right side
    124,939.84x = 13,742,422,588.88
  5. Step 5: Solve for x
    x = 13,742,422,588.88/124,939.84
  6. Step 6: Final answer
    x = 109,992.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.