Home / 81,210.30-121,815.45-73,952.70

Finding the Fourth Proportional to 81,210.30, 121,815.45 and 73,952.70

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Solution

The fourth proportional to 81,210.30, 121,815.45 and 73,952.70 is: 110,929.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,210.30 : 121,815.45 = 73,952.70 : x
  2. Step 2: Convert to fraction form
    81,210.30/121,815.45 = 73,952.70/x
  3. Step 3: Cross multiply
    81,210.30x = 121,815.45 × 73,952.70
  4. Step 4: Simplify right side
    81,210.30x = 9,008,581,429.22
  5. Step 5: Solve for x
    x = 9,008,581,429.22/81,210.30
  6. Step 6: Final answer
    x = 110,929.05

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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.