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Finding the Fourth Proportional to 80,352.69, 120,530.06 and 55,386.03

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Solution

The fourth proportional to 80,352.69, 120,530.06 and 55,386.03 is: 83,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,352.69 : 120,530.06 = 55,386.03 : x
  2. Step 2: Convert to fraction form
    80,352.69/120,530.06 = 55,386.03/x
  3. Step 3: Cross multiply
    80,352.69x = 120,530.06 × 55,386.03
  4. Step 4: Simplify right side
    80,352.69x = 6,675,681,901.82
  5. Step 5: Solve for x
    x = 6,675,681,901.82/80,352.69
  6. Step 6: Final answer
    x = 83,079.76

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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.