Home / 81,317.30-121,738.35-57,989.30

Finding the Fourth Proportional to 81,317.30, 121,738.35 and 57,989.30

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Solution

The fourth proportional to 81,317.30, 121,738.35 and 57,989.30 is: 86,814.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,317.30 : 121,738.35 = 57,989.30 : x
  2. Step 2: Convert to fraction form
    81,317.30/121,738.35 = 57,989.30/x
  3. Step 3: Cross multiply
    81,317.30x = 121,738.35 × 57,989.30
  4. Step 4: Simplify right side
    81,317.30x = 7,059,521,699.66
  5. Step 5: Solve for x
    x = 7,059,521,699.66/81,317.30
  6. Step 6: Final answer
    x = 86,814.51

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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.