Home / 90,744.70-136,117.05-86,662.30

Finding the Fourth Proportional to 90,744.70, 136,117.05 and 86,662.30

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Solution

The fourth proportional to 90,744.70, 136,117.05 and 86,662.30 is: 129,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,744.70 : 136,117.05 = 86,662.30 : x
  2. Step 2: Convert to fraction form
    90,744.70/136,117.05 = 86,662.30/x
  3. Step 3: Cross multiply
    90,744.70x = 136,117.05 × 86,662.30
  4. Step 4: Simplify right side
    90,744.70x = 11,796,216,622.22
  5. Step 5: Solve for x
    x = 11,796,216,622.22/90,744.70
  6. Step 6: Final answer
    x = 129,993.45

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1.5x scale

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.