Home / 90,991.11-136,563.35-38,438.31

Finding the Fourth Proportional to 90,991.11, 136,563.35 and 38,438.31

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Solution

The fourth proportional to 90,991.11, 136,563.35 and 38,438.31 is: 57,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991.11 : 136,563.35 = 38,438.31 : x
  2. Step 2: Convert to fraction form
    90,991.11/136,563.35 = 38,438.31/x
  3. Step 3: Cross multiply
    90,991.11x = 136,563.35 × 38,438.31
  4. Step 4: Simplify right side
    90,991.11x = 5,249,264,189.75
  5. Step 5: Solve for x
    x = 5,249,264,189.75/90,991.11
  6. Step 6: Final answer
    x = 57,689.86

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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.