Home / 85,783.18-128,690.94-32,491.11

Finding the Fourth Proportional to 85,783.18, 128,690.94 and 32,491.11

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Solution

The fourth proportional to 85,783.18, 128,690.94 and 32,491.11 is: 48,742.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,783.18 : 128,690.94 = 32,491.11 : x
  2. Step 2: Convert to fraction form
    85,783.18/128,690.94 = 32,491.11/x
  3. Step 3: Cross multiply
    85,783.18x = 128,690.94 × 32,491.11
  4. Step 4: Simplify right side
    85,783.18x = 4,181,311,368.09
  5. Step 5: Solve for x
    x = 4,181,311,368.09/85,783.18
  6. Step 6: Final answer
    x = 48,742.79

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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.