Home / 90,808.20-136,212.30-51,442.20

Finding the Fourth Proportional to 90,808.20, 136,212.30 and 51,442.20

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Solution

The fourth proportional to 90,808.20, 136,212.30 and 51,442.20 is: 77,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,808.20 : 136,212.30 = 51,442.20 : x
  2. Step 2: Convert to fraction form
    90,808.20/136,212.30 = 51,442.20/x
  3. Step 3: Cross multiply
    90,808.20x = 136,212.30 × 51,442.20
  4. Step 4: Simplify right side
    90,808.20x = 7,007,060,379.06
  5. Step 5: Solve for x
    x = 7,007,060,379.06/90,808.20
  6. Step 6: Final answer
    x = 77,163.30

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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.