Home / 90,815.85-136,322.73-68,869.17

Finding the Fourth Proportional to 90,815.85, 136,322.73 and 68,869.17

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Solution

The fourth proportional to 90,815.85, 136,322.73 and 68,869.17 is: 103,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.85 : 136,322.73 = 68,869.17 : x
  2. Step 2: Convert to fraction form
    90,815.85/136,322.73 = 68,869.17/x
  3. Step 3: Cross multiply
    90,815.85x = 136,322.73 × 68,869.17
  4. Step 4: Simplify right side
    90,815.85x = 9,388,433,267.23
  5. Step 5: Solve for x
    x = 9,388,433,267.23/90,815.85
  6. Step 6: Final answer
    x = 103,378.80

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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.