Home / 258,137.04-387,191.64-80,623.68

Finding the Fourth Proportional to 258,137.04, 387,191.64 and 80,623.68

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Solution

The fourth proportional to 258,137.04, 387,191.64 and 80,623.68 is: 120,931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,137.04 : 387,191.64 = 80,623.68 : x
  2. Step 2: Convert to fraction form
    258,137.04/387,191.64 = 80,623.68/x
  3. Step 3: Cross multiply
    258,137.04x = 387,191.64 × 80,623.68
  4. Step 4: Simplify right side
    258,137.04x = 31,216,814,882.04
  5. Step 5: Solve for x
    x = 31,216,814,882.04/258,137.04
  6. Step 6: Final answer
    x = 120,931.17

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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.