Home / 90,585.12-135,877.68-28,260.48

Finding the Fourth Proportional to 90,585.12, 135,877.68 and 28,260.48

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Solution

The fourth proportional to 90,585.12, 135,877.68 and 28,260.48 is: 42,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,585.12 : 135,877.68 = 28,260.48 : x
  2. Step 2: Convert to fraction form
    90,585.12/135,877.68 = 28,260.48/x
  3. Step 3: Cross multiply
    90,585.12x = 135,877.68 × 28,260.48
  4. Step 4: Simplify right side
    90,585.12x = 3,839,968,458.09
  5. Step 5: Solve for x
    x = 3,839,968,458.09/90,585.12
  6. Step 6: Final answer
    x = 42,390.72

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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.