Home / 90,265.75-135,529.86-66,646.15

Finding the Fourth Proportional to 90,265.75, 135,529.86 and 66,646.15

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Solution

The fourth proportional to 90,265.75, 135,529.86 and 66,646.15 is: 100,066.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,265.75 : 135,529.86 = 66,646.15 : x
  2. Step 2: Convert to fraction form
    90,265.75/135,529.86 = 66,646.15/x
  3. Step 3: Cross multiply
    90,265.75x = 135,529.86 × 66,646.15
  4. Step 4: Simplify right side
    90,265.75x = 9,032,543,379.04
  5. Step 5: Solve for x
    x = 9,032,543,379.04/90,265.75
  6. Step 6: Final answer
    x = 100,066.12

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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.