Home / 81,187.30-121,780.95-51,735.70

Finding the Fourth Proportional to 81,187.30, 121,780.95 and 51,735.70

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Solution

The fourth proportional to 81,187.30, 121,780.95 and 51,735.70 is: 77,603.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,187.30 : 121,780.95 = 51,735.70 : x
  2. Step 2: Convert to fraction form
    81,187.30/121,780.95 = 51,735.70/x
  3. Step 3: Cross multiply
    81,187.30x = 121,780.95 × 51,735.70
  4. Step 4: Simplify right side
    81,187.30x = 6,300,422,694.92
  5. Step 5: Solve for x
    x = 6,300,422,694.92/81,187.30
  6. Step 6: Final answer
    x = 77,603.55

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1.5x scale

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.