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Finding the Fourth Proportional to 90,309.63, 135,551.92 and 43,595.31

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Solution

The fourth proportional to 90,309.63, 135,551.92 and 43,595.31 is: 65,435.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,309.63 : 135,551.92 = 43,595.31 : x
  2. Step 2: Convert to fraction form
    90,309.63/135,551.92 = 43,595.31/x
  3. Step 3: Cross multiply
    90,309.63x = 135,551.92 × 43,595.31
  4. Step 4: Simplify right side
    90,309.63x = 5,909,427,973.50
  5. Step 5: Solve for x
    x = 5,909,427,973.50/90,309.63
  6. Step 6: Final answer
    x = 65,435.19

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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.