Home / 81,242.47-121,828.85-27,939.81

Finding the Fourth Proportional to 81,242.47, 121,828.85 and 27,939.81

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Solution

The fourth proportional to 81,242.47, 121,828.85 and 27,939.81 is: 41,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,242.47 : 121,828.85 = 27,939.81 : x
  2. Step 2: Convert to fraction form
    81,242.47/121,828.85 = 27,939.81/x
  3. Step 3: Cross multiply
    81,242.47x = 121,828.85 × 27,939.81
  4. Step 4: Simplify right side
    81,242.47x = 3,403,875,483.15
  5. Step 5: Solve for x
    x = 3,403,875,483.15/81,242.47
  6. Step 6: Final answer
    x = 41,897.73

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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.