Home / 90,922.60-136,383.90-28,612.20

Finding the Fourth Proportional to 90,922.60, 136,383.90 and 28,612.20

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Solution

The fourth proportional to 90,922.60, 136,383.90 and 28,612.20 is: 42,918.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,922.60 : 136,383.90 = 28,612.20 : x
  2. Step 2: Convert to fraction form
    90,922.60/136,383.90 = 28,612.20/x
  3. Step 3: Cross multiply
    90,922.60x = 136,383.90 × 28,612.20
  4. Step 4: Simplify right side
    90,922.60x = 3,902,243,423.58
  5. Step 5: Solve for x
    x = 3,902,243,423.58/90,922.60
  6. Step 6: Final answer
    x = 42,918.30

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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.