Home / 258,347.06-387,311.47-80,762.66

Finding the Fourth Proportional to 258,347.06, 387,311.47 and 80,762.66

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Solution

The fourth proportional to 258,347.06, 387,311.47 and 80,762.66 is: 121,078.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,347.06 : 387,311.47 = 80,762.66 : x
  2. Step 2: Convert to fraction form
    258,347.06/387,311.47 = 80,762.66/x
  3. Step 3: Cross multiply
    258,347.06x = 387,311.47 × 80,762.66
  4. Step 4: Simplify right side
    258,347.06x = 31,280,304,333.95
  5. Step 5: Solve for x
    x = 31,280,304,333.95/258,347.06
  6. Step 6: Final answer
    x = 121,078.62

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1.5x scale

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.