Home / 90,001.20-134,742.60-55,009.20

Finding the Fourth Proportional to 90,001.20, 134,742.60 and 55,009.20

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Solution

The fourth proportional to 90,001.20, 134,742.60 and 55,009.20 is: 82,355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,001.20 : 134,742.60 = 55,009.20 : x
  2. Step 2: Convert to fraction form
    90,001.20/134,742.60 = 55,009.20/x
  3. Step 3: Cross multiply
    90,001.20x = 134,742.60 × 55,009.20
  4. Step 4: Simplify right side
    90,001.20x = 7,412,082,631.92
  5. Step 5: Solve for x
    x = 7,412,082,631.92/90,001.20
  6. Step 6: Final answer
    x = 82,355.38

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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.