Home / 90,318.32-135,448.77-84,421.62

Finding the Fourth Proportional to 90,318.32, 135,448.77 and 84,421.62

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Solution

The fourth proportional to 90,318.32, 135,448.77 and 84,421.62 is: 126,605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,318.32 : 135,448.77 = 84,421.62 : x
  2. Step 2: Convert to fraction form
    90,318.32/135,448.77 = 84,421.62/x
  3. Step 3: Cross multiply
    90,318.32x = 135,448.77 × 84,421.62
  4. Step 4: Simplify right side
    90,318.32x = 11,434,804,169.89
  5. Step 5: Solve for x
    x = 11,434,804,169.89/90,318.32
  6. Step 6: Final answer
    x = 126,605.60

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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.