Home / 82,581.93-113,972.63-77,515.11

Finding the Fourth Proportional to 82,581.93, 113,972.63 and 77,515.11

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Solution

The fourth proportional to 82,581.93, 113,972.63 and 77,515.11 is: 106,979.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,581.93 : 113,972.63 = 77,515.11 : x
  2. Step 2: Convert to fraction form
    82,581.93/113,972.63 = 77,515.11/x
  3. Step 3: Cross multiply
    82,581.93x = 113,972.63 × 77,515.11
  4. Step 4: Simplify right side
    82,581.93x = 8,834,600,563.86
  5. Step 5: Solve for x
    x = 8,834,600,563.86/82,581.93
  6. Step 6: Final answer
    x = 106,979.83

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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.