Home / 81,090.08-111,981.60-76,672.40

Finding the Fourth Proportional to 81,090.08, 111,981.60 and 76,672.40

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Solution

The fourth proportional to 81,090.08, 111,981.60 and 76,672.40 is: 105,880.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.08 : 111,981.60 = 76,672.40 : x
  2. Step 2: Convert to fraction form
    81,090.08/111,981.60 = 76,672.40/x
  3. Step 3: Cross multiply
    81,090.08x = 111,981.60 × 76,672.40
  4. Step 4: Simplify right side
    81,090.08x = 8,585,898,027.84
  5. Step 5: Solve for x
    x = 8,585,898,027.84/81,090.08
  6. Step 6: Final answer
    x = 105,880.99

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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.