Home / 123,566.40-185,182.74-90,129.60

Finding the Fourth Proportional to 123,566.40, 185,182.74 and 90,129.60

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Solution

The fourth proportional to 123,566.40, 185,182.74 and 90,129.60 is: 135,072.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,566.40 : 185,182.74 = 90,129.60 : x
  2. Step 2: Convert to fraction form
    123,566.40/185,182.74 = 90,129.60/x
  3. Step 3: Cross multiply
    123,566.40x = 185,182.74 × 90,129.60
  4. Step 4: Simplify right side
    123,566.40x = 16,690,446,283.10
  5. Step 5: Solve for x
    x = 16,690,446,283.10/123,566.40
  6. Step 6: Final answer
    x = 135,072.69

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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.