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Finding the Fourth Proportional to 86,346.80, 129,811.80 and 73,516.40

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Solution

The fourth proportional to 86,346.80, 129,811.80 and 73,516.40 is: 110,522.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,346.80 : 129,811.80 = 73,516.40 : x
  2. Step 2: Convert to fraction form
    86,346.80/129,811.80 = 73,516.40/x
  3. Step 3: Cross multiply
    86,346.80x = 129,811.80 × 73,516.40
  4. Step 4: Simplify right side
    86,346.80x = 9,543,296,213.52
  5. Step 5: Solve for x
    x = 9,543,296,213.52/86,346.80
  6. Step 6: Final answer
    x = 110,522.87

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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.