Home / 81,215.24-121,859.22-51,625.40

Finding the Fourth Proportional to 81,215.24, 121,859.22 and 51,625.40

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Solution

The fourth proportional to 81,215.24, 121,859.22 and 51,625.40 is: 77,461.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.24 : 121,859.22 = 51,625.40 : x
  2. Step 2: Convert to fraction form
    81,215.24/121,859.22 = 51,625.40/x
  3. Step 3: Cross multiply
    81,215.24x = 121,859.22 × 51,625.40
  4. Step 4: Simplify right side
    81,215.24x = 6,291,030,976.19
  5. Step 5: Solve for x
    x = 6,291,030,976.19/81,215.24
  6. Step 6: Final answer
    x = 77,461.21

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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.