Home / 103,988.46-143,591.56-65,815.36

Finding the Fourth Proportional to 103,988.46, 143,591.56 and 65,815.36

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Solution

The fourth proportional to 103,988.46, 143,591.56 and 65,815.36 is: 90,880.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,988.46 : 143,591.56 = 65,815.36 : x
  2. Step 2: Convert to fraction form
    103,988.46/143,591.56 = 65,815.36/x
  3. Step 3: Cross multiply
    103,988.46x = 143,591.56 × 65,815.36
  4. Step 4: Simplify right side
    103,988.46x = 9,450,530,279.80
  5. Step 5: Solve for x
    x = 9,450,530,279.80/103,988.46
  6. Step 6: Final answer
    x = 90,880.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.