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Finding the Fourth Proportional to 77,388.60, 115,992.18 and 35,748.12

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Solution

The fourth proportional to 77,388.60, 115,992.18 and 35,748.12 is: 53,580.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,388.60 : 115,992.18 = 35,748.12 : x
  2. Step 2: Convert to fraction form
    77,388.60/115,992.18 = 35,748.12/x
  3. Step 3: Cross multiply
    77,388.60x = 115,992.18 × 35,748.12
  4. Step 4: Simplify right side
    77,388.60x = 4,146,502,369.70
  5. Step 5: Solve for x
    x = 4,146,502,369.70/77,388.60
  6. Step 6: Final answer
    x = 53,580.27

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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.