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Finding the Fourth Proportional to 77,120.72, 115,602.28 and 43,770.32

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Solution

The fourth proportional to 77,120.72, 115,602.28 and 43,770.32 is: 65,610.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,120.72 : 115,602.28 = 43,770.32 : x
  2. Step 2: Convert to fraction form
    77,120.72/115,602.28 = 43,770.32/x
  3. Step 3: Cross multiply
    77,120.72x = 115,602.28 × 43,770.32
  4. Step 4: Simplify right side
    77,120.72x = 5,059,948,788.33
  5. Step 5: Solve for x
    x = 5,059,948,788.33/77,120.72
  6. Step 6: Final answer
    x = 65,610.76

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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.