Home / 103,920.12-143,377.16-63,591.84

Finding the Fourth Proportional to 103,920.12, 143,377.16 and 63,591.84

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Solution

The fourth proportional to 103,920.12, 143,377.16 and 63,591.84 is: 87,736.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,920.12 : 143,377.16 = 63,591.84 : x
  2. Step 2: Convert to fraction form
    103,920.12/143,377.16 = 63,591.84/x
  3. Step 3: Cross multiply
    103,920.12x = 143,377.16 × 63,591.84
  4. Step 4: Simplify right side
    103,920.12x = 9,117,617,100.42
  5. Step 5: Solve for x
    x = 9,117,617,100.42/103,920.12
  6. Step 6: Final answer
    x = 87,736.78

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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.