Home / 81,209.94-121,519.64-67,038.18

Finding the Fourth Proportional to 81,209.94, 121,519.64 and 67,038.18

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Solution

The fourth proportional to 81,209.94, 121,519.64 and 67,038.18 is: 100,313.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,209.94 : 121,519.64 = 67,038.18 : x
  2. Step 2: Convert to fraction form
    81,209.94/121,519.64 = 67,038.18/x
  3. Step 3: Cross multiply
    81,209.94x = 121,519.64 × 67,038.18
  4. Step 4: Simplify right side
    81,209.94x = 8,146,455,499.86
  5. Step 5: Solve for x
    x = 8,146,455,499.86/81,209.94
  6. Step 6: Final answer
    x = 100,313.53

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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.