Home / 76,120.32-113,895.36-72,120

Finding the Fourth Proportional to 76,120.32, 113,895.36 and 72,120

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Solution

The fourth proportional to 76,120.32, 113,895.36 and 72,120 is: 107,909.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,120.32 : 113,895.36 = 72,120 : x
  2. Step 2: Convert to fraction form
    76,120.32/113,895.36 = 72,120/x
  3. Step 3: Cross multiply
    76,120.32x = 113,895.36 × 72,120
  4. Step 4: Simplify right side
    76,120.32x = 8,214,133,363.20
  5. Step 5: Solve for x
    x = 8,214,133,363.20/76,120.32
  6. Step 6: Final answer
    x = 107,909.86

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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.