Home / 81,283.12-121,813.88-39,160.14

Finding the Fourth Proportional to 81,283.12, 121,813.88 and 39,160.14

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Solution

The fourth proportional to 81,283.12, 121,813.88 and 39,160.14 is: 58,686.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,283.12 : 121,813.88 = 39,160.14 : x
  2. Step 2: Convert to fraction form
    81,283.12/121,813.88 = 39,160.14/x
  3. Step 3: Cross multiply
    81,283.12x = 121,813.88 × 39,160.14
  4. Step 4: Simplify right side
    81,283.12x = 4,770,248,594.74
  5. Step 5: Solve for x
    x = 4,770,248,594.74/81,283.12
  6. Step 6: Final answer
    x = 58,686.83

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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.