Home / 81,283.80-121,925.70-57,664.20

Finding the Fourth Proportional to 81,283.80, 121,925.70 and 57,664.20

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Solution

The fourth proportional to 81,283.80, 121,925.70 and 57,664.20 is: 86,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,283.80 : 121,925.70 = 57,664.20 : x
  2. Step 2: Convert to fraction form
    81,283.80/121,925.70 = 57,664.20/x
  3. Step 3: Cross multiply
    81,283.80x = 121,925.70 × 57,664.20
  4. Step 4: Simplify right side
    81,283.80x = 7,030,747,949.94
  5. Step 5: Solve for x
    x = 7,030,747,949.94/81,283.80
  6. Step 6: Final answer
    x = 86,496.30

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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.