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Finding the Fourth Proportional to 90,855, 136,287.36 and 28,530.36

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Solution

The fourth proportional to 90,855, 136,287.36 and 28,530.36 is: 42,797.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,855 : 136,287.36 = 28,530.36 : x
  2. Step 2: Convert to fraction form
    90,855/136,287.36 = 28,530.36/x
  3. Step 3: Cross multiply
    90,855x = 136,287.36 × 28,530.36
  4. Step 4: Simplify right side
    90,855x = 3,888,327,444.25
  5. Step 5: Solve for x
    x = 3,888,327,444.25/90,855
  6. Step 6: Final answer
    x = 42,797.07

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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.