Home / 90,968.20-136,452.30-86,885.80

Finding the Fourth Proportional to 90,968.20, 136,452.30 and 86,885.80

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Solution

The fourth proportional to 90,968.20, 136,452.30 and 86,885.80 is: 130,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,968.20 : 136,452.30 = 86,885.80 : x
  2. Step 2: Convert to fraction form
    90,968.20/136,452.30 = 86,885.80/x
  3. Step 3: Cross multiply
    90,968.20x = 136,452.30 × 86,885.80
  4. Step 4: Simplify right side
    90,968.20x = 11,855,767,247.34
  5. Step 5: Solve for x
    x = 11,855,767,247.34/90,968.20
  6. Step 6: Final answer
    x = 130,328.70

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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.