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Finding the Fourth Proportional to 90,873.69, 136,332.09 and 28,544.19

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Solution

The fourth proportional to 90,873.69, 136,332.09 and 28,544.19 is: 42,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,873.69 : 136,332.09 = 28,544.19 : x
  2. Step 2: Convert to fraction form
    90,873.69/136,332.09 = 28,544.19/x
  3. Step 3: Cross multiply
    90,873.69x = 136,332.09 × 28,544.19
  4. Step 4: Simplify right side
    90,873.69x = 3,891,489,080.06
  5. Step 5: Solve for x
    x = 3,891,489,080.06/90,873.69
  6. Step 6: Final answer
    x = 42,823.06

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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.