Home / 90,983.40-136,329.30-57,643.80

Finding the Fourth Proportional to 90,983.40, 136,329.30 and 57,643.80

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Solution

The fourth proportional to 90,983.40, 136,329.30 and 57,643.80 is: 86,373.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,983.40 : 136,329.30 = 57,643.80 : x
  2. Step 2: Convert to fraction form
    90,983.40/136,329.30 = 57,643.80/x
  3. Step 3: Cross multiply
    90,983.40x = 136,329.30 × 57,643.80
  4. Step 4: Simplify right side
    90,983.40x = 7,858,538,903.34
  5. Step 5: Solve for x
    x = 7,858,538,903.34/90,983.40
  6. Step 6: Final answer
    x = 86,373.33

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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.