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Finding the Fourth Proportional to 79,775.92, 119,554.53 and 77,381.16

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Solution

The fourth proportional to 79,775.92, 119,554.53 and 77,381.16 is: 115,965.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,775.92 : 119,554.53 = 77,381.16 : x
  2. Step 2: Convert to fraction form
    79,775.92/119,554.53 = 77,381.16/x
  3. Step 3: Cross multiply
    79,775.92x = 119,554.53 × 77,381.16
  4. Step 4: Simplify right side
    79,775.92x = 9,251,268,214.65
  5. Step 5: Solve for x
    x = 9,251,268,214.65/79,775.92
  6. Step 6: Final answer
    x = 115,965.67

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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.