Home / 90,789.63-136,206.31-28,460.13

Finding the Fourth Proportional to 90,789.63, 136,206.31 and 28,460.13

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Solution

The fourth proportional to 90,789.63, 136,206.31 and 28,460.13 is: 42,697.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,789.63 : 136,206.31 = 28,460.13 : x
  2. Step 2: Convert to fraction form
    90,789.63/136,206.31 = 28,460.13/x
  3. Step 3: Cross multiply
    90,789.63x = 136,206.31 × 28,460.13
  4. Step 4: Simplify right side
    90,789.63x = 3,876,449,289.42
  5. Step 5: Solve for x
    x = 3,876,449,289.42/90,789.63
  6. Step 6: Final answer
    x = 42,697.05

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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.