Home / 82,409.20-113,624.40-69,639.28

Finding the Fourth Proportional to 82,409.20, 113,624.40 and 69,639.28

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Solution

The fourth proportional to 82,409.20, 113,624.40 and 69,639.28 is: 96,017.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,409.20 : 113,624.40 = 69,639.28 : x
  2. Step 2: Convert to fraction form
    82,409.20/113,624.40 = 69,639.28/x
  3. Step 3: Cross multiply
    82,409.20x = 113,624.40 × 69,639.28
  4. Step 4: Simplify right side
    82,409.20x = 7,912,721,406.43
  5. Step 5: Solve for x
    x = 7,912,721,406.43/82,409.20
  6. Step 6: Final answer
    x = 96,017.45

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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.