Home / 84,859.18-127,288.78-21,679.45

Finding the Fourth Proportional to 84,859.18, 127,288.78 and 21,679.45

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Solution

The fourth proportional to 84,859.18, 127,288.78 and 21,679.45 is: 32,519.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,859.18 : 127,288.78 = 21,679.45 : x
  2. Step 2: Convert to fraction form
    84,859.18/127,288.78 = 21,679.45/x
  3. Step 3: Cross multiply
    84,859.18x = 127,288.78 × 21,679.45
  4. Step 4: Simplify right side
    84,859.18x = 2,759,550,369.15
  5. Step 5: Solve for x
    x = 2,759,550,369.15/84,859.18
  6. Step 6: Final answer
    x = 32,519.17

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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.