Home / 81,130.29-121,758.20-53,042.73

Finding the Fourth Proportional to 81,130.29, 121,758.20 and 53,042.73

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Solution

The fourth proportional to 81,130.29, 121,758.20 and 53,042.73 is: 79,605.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130.29 : 121,758.20 = 53,042.73 : x
  2. Step 2: Convert to fraction form
    81,130.29/121,758.20 = 53,042.73/x
  3. Step 3: Cross multiply
    81,130.29x = 121,758.20 × 53,042.73
  4. Step 4: Simplify right side
    81,130.29x = 6,458,387,327.89
  5. Step 5: Solve for x
    x = 6,458,387,327.89/81,130.29
  6. Step 6: Final answer
    x = 79,605.13

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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.