Home / 280,923.24-421,397.16-81,263.81

Finding the Fourth Proportional to 280,923.24, 421,397.16 and 81,263.81

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Solution

The fourth proportional to 280,923.24, 421,397.16 and 81,263.81 is: 121,899.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,923.24 : 421,397.16 = 81,263.81 : x
  2. Step 2: Convert to fraction form
    280,923.24/421,397.16 = 81,263.81/x
  3. Step 3: Cross multiply
    280,923.24x = 421,397.16 × 81,263.81
  4. Step 4: Simplify right side
    280,923.24x = 34,244,338,744.78
  5. Step 5: Solve for x
    x = 34,244,338,744.78/280,923.24
  6. Step 6: Final answer
    x = 121,899.27

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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.