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Finding the Fourth Proportional to 76,661.80, 114,992.70 and 57,999.40

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Solution

The fourth proportional to 76,661.80, 114,992.70 and 57,999.40 is: 86,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,661.80 : 114,992.70 = 57,999.40 : x
  2. Step 2: Convert to fraction form
    76,661.80/114,992.70 = 57,999.40/x
  3. Step 3: Cross multiply
    76,661.80x = 114,992.70 × 57,999.40
  4. Step 4: Simplify right side
    76,661.80x = 6,669,507,604.38
  5. Step 5: Solve for x
    x = 6,669,507,604.38/76,661.80
  6. Step 6: Final answer
    x = 86,999.10

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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.