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Finding the Fourth Proportional to 131,034.60, 196,697.70 and 71,985.60

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Solution

The fourth proportional to 131,034.60, 196,697.70 and 71,985.60 is: 108,058.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,034.60 : 196,697.70 = 71,985.60 : x
  2. Step 2: Convert to fraction form
    131,034.60/196,697.70 = 71,985.60/x
  3. Step 3: Cross multiply
    131,034.60x = 196,697.70 × 71,985.60
  4. Step 4: Simplify right side
    131,034.60x = 14,159,401,953.12
  5. Step 5: Solve for x
    x = 14,159,401,953.12/131,034.60
  6. Step 6: Final answer
    x = 108,058.50

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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.