Home / 99,138.30-136,284.79-85,290.04

Finding the Fourth Proportional to 99,138.30, 136,284.79 and 85,290.04

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Solution

The fourth proportional to 99,138.30, 136,284.79 and 85,290.04 is: 117,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,138.30 : 136,284.79 = 85,290.04 : x
  2. Step 2: Convert to fraction form
    99,138.30/136,284.79 = 85,290.04/x
  3. Step 3: Cross multiply
    99,138.30x = 136,284.79 × 85,290.04
  4. Step 4: Simplify right side
    99,138.30x = 11,623,734,636.55
  5. Step 5: Solve for x
    x = 11,623,734,636.55/99,138.30
  6. Step 6: Final answer
    x = 117,247.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.