Home / 90,409.03-135,641.70-54,424.59

Finding the Fourth Proportional to 90,409.03, 135,641.70 and 54,424.59

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Solution

The fourth proportional to 90,409.03, 135,641.70 and 54,424.59 is: 81,653.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.03 : 135,641.70 = 54,424.59 : x
  2. Step 2: Convert to fraction form
    90,409.03/135,641.70 = 54,424.59/x
  3. Step 3: Cross multiply
    90,409.03x = 135,641.70 × 54,424.59
  4. Step 4: Simplify right side
    90,409.03x = 7,382,243,909.40
  5. Step 5: Solve for x
    x = 7,382,243,909.40/90,409.03
  6. Step 6: Final answer
    x = 81,653.83

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1.5x scale

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.