Home / 90,777.40-136,050.90-80,870.20

Finding the Fourth Proportional to 90,777.40, 136,050.90 and 80,870.20

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Solution

The fourth proportional to 90,777.40, 136,050.90 and 80,870.20 is: 121,202.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,777.40 : 136,050.90 = 80,870.20 : x
  2. Step 2: Convert to fraction form
    90,777.40/136,050.90 = 80,870.20/x
  3. Step 3: Cross multiply
    90,777.40x = 136,050.90 × 80,870.20
  4. Step 4: Simplify right side
    90,777.40x = 11,002,463,493.18
  5. Step 5: Solve for x
    x = 11,002,463,493.18/90,777.40
  6. Step 6: Final answer
    x = 121,202.67

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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.