Home / 124,786.85-172,209.31-76,387.79

Finding the Fourth Proportional to 124,786.85, 172,209.31 and 76,387.79

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Solution

The fourth proportional to 124,786.85, 172,209.31 and 76,387.79 is: 105,417.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,786.85 : 172,209.31 = 76,387.79 : x
  2. Step 2: Convert to fraction form
    124,786.85/172,209.31 = 76,387.79/x
  3. Step 3: Cross multiply
    124,786.85x = 172,209.31 × 76,387.79
  4. Step 4: Simplify right side
    124,786.85x = 13,154,688,847.88
  5. Step 5: Solve for x
    x = 13,154,688,847.88/124,786.85
  6. Step 6: Final answer
    x = 105,417.27

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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.