Home / 81,129.29-121,756.70-53,041.73

Finding the Fourth Proportional to 81,129.29, 121,756.70 and 53,041.73

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Solution

The fourth proportional to 81,129.29, 121,756.70 and 53,041.73 is: 79,603.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129.29 : 121,756.70 = 53,041.73 : x
  2. Step 2: Convert to fraction form
    81,129.29/121,756.70 = 53,041.73/x
  3. Step 3: Cross multiply
    81,129.29x = 121,756.70 × 53,041.73
  4. Step 4: Simplify right side
    81,129.29x = 6,458,185,133.10
  5. Step 5: Solve for x
    x = 6,458,185,133.10/81,129.29
  6. Step 6: Final answer
    x = 79,603.62

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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.