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Finding the Fourth Proportional to 90,606.30, 135,890.01 and 28,242.78

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Solution

The fourth proportional to 90,606.30, 135,890.01 and 28,242.78 is: 42,358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,606.30 : 135,890.01 = 28,242.78 : x
  2. Step 2: Convert to fraction form
    90,606.30/135,890.01 = 28,242.78/x
  3. Step 3: Cross multiply
    90,606.30x = 135,890.01 × 28,242.78
  4. Step 4: Simplify right side
    90,606.30x = 3,837,911,656.63
  5. Step 5: Solve for x
    x = 3,837,911,656.63/90,606.30
  6. Step 6: Final answer
    x = 42,358.11

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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.