Home / 81,000.30-121,500.45-51,548.70

Finding the Fourth Proportional to 81,000.30, 121,500.45 and 51,548.70

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Solution

The fourth proportional to 81,000.30, 121,500.45 and 51,548.70 is: 77,323.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.30 : 121,500.45 = 51,548.70 : x
  2. Step 2: Convert to fraction form
    81,000.30/121,500.45 = 51,548.70/x
  3. Step 3: Cross multiply
    81,000.30x = 121,500.45 × 51,548.70
  4. Step 4: Simplify right side
    81,000.30x = 6,263,190,246.92
  5. Step 5: Solve for x
    x = 6,263,190,246.92/81,000.30
  6. Step 6: Final answer
    x = 77,323.05

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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.