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Finding the Fourth Proportional to 76,722.39, 115,009.20 and 39,300.12

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Solution

The fourth proportional to 76,722.39, 115,009.20 and 39,300.12 is: 58,912.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,722.39 : 115,009.20 = 39,300.12 : x
  2. Step 2: Convert to fraction form
    76,722.39/115,009.20 = 39,300.12/x
  3. Step 3: Cross multiply
    76,722.39x = 115,009.20 × 39,300.12
  4. Step 4: Simplify right side
    76,722.39x = 4,519,875,361.10
  5. Step 5: Solve for x
    x = 4,519,875,361.10/76,722.39
  6. Step 6: Final answer
    x = 58,912.08

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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.