Home / 258,119.04-387,164.64-80,605.68

Finding the Fourth Proportional to 258,119.04, 387,164.64 and 80,605.68

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Solution

The fourth proportional to 258,119.04, 387,164.64 and 80,605.68 is: 120,904.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,119.04 : 387,164.64 = 80,605.68 : x
  2. Step 2: Convert to fraction form
    258,119.04/387,164.64 = 80,605.68/x
  3. Step 3: Cross multiply
    258,119.04x = 387,164.64 × 80,605.68
  4. Step 4: Simplify right side
    258,119.04x = 31,207,669,079.16
  5. Step 5: Solve for x
    x = 31,207,669,079.16/258,119.04
  6. Step 6: Final answer
    x = 120,904.17

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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.