Home / 83,720.72-115,564.92-55,435.52

Finding the Fourth Proportional to 83,720.72, 115,564.92 and 55,435.52

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Solution

The fourth proportional to 83,720.72, 115,564.92 and 55,435.52 is: 76,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,720.72 : 115,564.92 = 55,435.52 : x
  2. Step 2: Convert to fraction form
    83,720.72/115,564.92 = 55,435.52/x
  3. Step 3: Cross multiply
    83,720.72x = 115,564.92 × 55,435.52
  4. Step 4: Simplify right side
    83,720.72x = 6,406,401,433.96
  5. Step 5: Solve for x
    x = 6,406,401,433.96/83,720.72
  6. Step 6: Final answer
    x = 76,521.10

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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.