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Finding the Fourth Proportional to 86,763.60, 119,729.16 and 49,035.60

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Solution

The fourth proportional to 86,763.60, 119,729.16 and 49,035.60 is: 67,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,763.60 : 119,729.16 = 49,035.60 : x
  2. Step 2: Convert to fraction form
    86,763.60/119,729.16 = 49,035.60/x
  3. Step 3: Cross multiply
    86,763.60x = 119,729.16 × 49,035.60
  4. Step 4: Simplify right side
    86,763.60x = 5,870,991,198.10
  5. Step 5: Solve for x
    x = 5,870,991,198.10/86,763.60
  6. Step 6: Final answer
    x = 67,666.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.