Home / 89,720.96-134,359.86-66,870.03

Finding the Fourth Proportional to 89,720.96, 134,359.86 and 66,870.03

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Solution

The fourth proportional to 89,720.96, 134,359.86 and 66,870.03 is: 100,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,720.96 : 134,359.86 = 66,870.03 : x
  2. Step 2: Convert to fraction form
    89,720.96/134,359.86 = 66,870.03/x
  3. Step 3: Cross multiply
    89,720.96x = 134,359.86 × 66,870.03
  4. Step 4: Simplify right side
    89,720.96x = 8,984,647,869.00
  5. Step 5: Solve for x
    x = 8,984,647,869.00/89,720.96
  6. Step 6: Final answer
    x = 100,139.90

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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.