Home / 81,322.30-121,923.19-38,606.59

Finding the Fourth Proportional to 81,322.30, 121,923.19 and 38,606.59

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Solution

The fourth proportional to 81,322.30, 121,923.19 and 38,606.59 is: 57,881.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,322.30 : 121,923.19 = 38,606.59 : x
  2. Step 2: Convert to fraction form
    81,322.30/121,923.19 = 38,606.59/x
  3. Step 3: Cross multiply
    81,322.30x = 121,923.19 × 38,606.59
  4. Step 4: Simplify right side
    81,322.30x = 4,707,038,607.82
  5. Step 5: Solve for x
    x = 4,707,038,607.82/81,322.30
  6. Step 6: Final answer
    x = 57,881.28

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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.