Home / 280,986.17-421,700.67-103,617.72

Finding the Fourth Proportional to 280,986.17, 421,700.67 and 103,617.72

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Solution

The fourth proportional to 280,986.17, 421,700.67 and 103,617.72 is: 155,508.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,986.17 : 421,700.67 = 103,617.72 : x
  2. Step 2: Convert to fraction form
    280,986.17/421,700.67 = 103,617.72/x
  3. Step 3: Cross multiply
    280,986.17x = 421,700.67 × 103,617.72
  4. Step 4: Simplify right side
    280,986.17x = 43,695,661,947.87
  5. Step 5: Solve for x
    x = 43,695,661,947.87/280,986.17
  6. Step 6: Final answer
    x = 155,508.23

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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.