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Finding the Fourth Proportional to 77,035.60, 115,326.60 and 57,401.20

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Solution

The fourth proportional to 77,035.60, 115,326.60 and 57,401.20 is: 85,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,035.60 : 115,326.60 = 57,401.20 : x
  2. Step 2: Convert to fraction form
    77,035.60/115,326.60 = 57,401.20/x
  3. Step 3: Cross multiply
    77,035.60x = 115,326.60 × 57,401.20
  4. Step 4: Simplify right side
    77,035.60x = 6,619,885,231.92
  5. Step 5: Solve for x
    x = 6,619,885,231.92/77,035.60
  6. Step 6: Final answer
    x = 85,932.81

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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.