Home / 280,972.48-387,729.68-160,139.92

Finding the Fourth Proportional to 280,972.48, 387,729.68 and 160,139.92

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Solution

The fourth proportional to 280,972.48, 387,729.68 and 160,139.92 is: 220,986.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,972.48 : 387,729.68 = 160,139.92 : x
  2. Step 2: Convert to fraction form
    280,972.48/387,729.68 = 160,139.92/x
  3. Step 3: Cross multiply
    280,972.48x = 387,729.68 × 160,139.92
  4. Step 4: Simplify right side
    280,972.48x = 62,090,999,936.83
  5. Step 5: Solve for x
    x = 62,090,999,936.83/280,972.48
  6. Step 6: Final answer
    x = 220,986.06

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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.