Home / 90,515.79-135,782.93-31,351.35

Finding the Fourth Proportional to 90,515.79, 135,782.93 and 31,351.35

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Solution

The fourth proportional to 90,515.79, 135,782.93 and 31,351.35 is: 47,030.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,515.79 : 135,782.93 = 31,351.35 : x
  2. Step 2: Convert to fraction form
    90,515.79/135,782.93 = 31,351.35/x
  3. Step 3: Cross multiply
    90,515.79x = 135,782.93 × 31,351.35
  4. Step 4: Simplify right side
    90,515.79x = 4,256,978,005.70
  5. Step 5: Solve for x
    x = 4,256,978,005.70/90,515.79
  6. Step 6: Final answer
    x = 47,030.23

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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.