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Finding the Fourth Proportional to 78,734.80, 117,814.20 and 57,998.80

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Solution

The fourth proportional to 78,734.80, 117,814.20 and 57,998.80 is: 86,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,734.80 : 117,814.20 = 57,998.80 : x
  2. Step 2: Convert to fraction form
    78,734.80/117,814.20 = 57,998.80/x
  3. Step 3: Cross multiply
    78,734.80x = 117,814.20 × 57,998.80
  4. Step 4: Simplify right side
    78,734.80x = 6,833,082,222.96
  5. Step 5: Solve for x
    x = 6,833,082,222.96/78,734.80
  6. Step 6: Final answer
    x = 86,786.05

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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.