Home / 208,214.40-312,321.60-89,803.20

Finding the Fourth Proportional to 208,214.40, 312,321.60 and 89,803.20

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Solution

The fourth proportional to 208,214.40, 312,321.60 and 89,803.20 is: 134,704.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,214.40 : 312,321.60 = 89,803.20 : x
  2. Step 2: Convert to fraction form
    208,214.40/312,321.60 = 89,803.20/x
  3. Step 3: Cross multiply
    208,214.40x = 312,321.60 × 89,803.20
  4. Step 4: Simplify right side
    208,214.40x = 28,047,479,109.12
  5. Step 5: Solve for x
    x = 28,047,479,109.12/208,214.40
  6. Step 6: Final answer
    x = 134,704.80

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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.