Home / 77,155.96-115,545.21-69,676.42

Finding the Fourth Proportional to 77,155.96, 115,545.21 and 69,676.42

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Solution

The fourth proportional to 77,155.96, 115,545.21 and 69,676.42 is: 104,344.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,155.96 : 115,545.21 = 69,676.42 : x
  2. Step 2: Convert to fraction form
    77,155.96/115,545.21 = 69,676.42/x
  3. Step 3: Cross multiply
    77,155.96x = 115,545.21 × 69,676.42
  4. Step 4: Simplify right side
    77,155.96x = 8,050,776,580.95
  5. Step 5: Solve for x
    x = 8,050,776,580.95/77,155.96
  6. Step 6: Final answer
    x = 104,344.20

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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.