Home / 259,474.77-389,209.81-81,981.77

Finding the Fourth Proportional to 259,474.77, 389,209.81 and 81,981.77

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Solution

The fourth proportional to 259,474.77, 389,209.81 and 81,981.77 is: 122,971.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,474.77 : 389,209.81 = 81,981.77 : x
  2. Step 2: Convert to fraction form
    259,474.77/389,209.81 = 81,981.77/x
  3. Step 3: Cross multiply
    259,474.77x = 389,209.81 × 81,981.77
  4. Step 4: Simplify right side
    259,474.77x = 31,908,109,125.16
  5. Step 5: Solve for x
    x = 31,908,109,125.16/259,474.77
  6. Step 6: Final answer
    x = 122,971.91

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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.