Home / 81,285.36-121,895.52-31,337.76

Finding the Fourth Proportional to 81,285.36, 121,895.52 and 31,337.76

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Solution

The fourth proportional to 81,285.36, 121,895.52 and 31,337.76 is: 46,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,285.36 : 121,895.52 = 31,337.76 : x
  2. Step 2: Convert to fraction form
    81,285.36/121,895.52 = 31,337.76/x
  3. Step 3: Cross multiply
    81,285.36x = 121,895.52 × 31,337.76
  4. Step 4: Simplify right side
    81,285.36x = 3,819,932,550.84
  5. Step 5: Solve for x
    x = 3,819,932,550.84/81,285.36
  6. Step 6: Final answer
    x = 46,994.10

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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.