Home / 77,331.60-115,997.40-40,390.80

Finding the Fourth Proportional to 77,331.60, 115,997.40 and 40,390.80

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Solution

The fourth proportional to 77,331.60, 115,997.40 and 40,390.80 is: 60,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,331.60 : 115,997.40 = 40,390.80 : x
  2. Step 2: Convert to fraction form
    77,331.60/115,997.40 = 40,390.80/x
  3. Step 3: Cross multiply
    77,331.60x = 115,997.40 × 40,390.80
  4. Step 4: Simplify right side
    77,331.60x = 4,685,227,783.92
  5. Step 5: Solve for x
    x = 4,685,227,783.92/77,331.60
  6. Step 6: Final answer
    x = 60,586.20

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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.