Home / 208,146.09-312,343.68-89,817.42

Finding the Fourth Proportional to 208,146.09, 312,343.68 and 89,817.42

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Solution

The fourth proportional to 208,146.09, 312,343.68 and 89,817.42 is: 134,779.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,146.09 : 312,343.68 = 89,817.42 : x
  2. Step 2: Convert to fraction form
    208,146.09/312,343.68 = 89,817.42/x
  3. Step 3: Cross multiply
    208,146.09x = 312,343.68 × 89,817.42
  4. Step 4: Simplify right side
    208,146.09x = 28,053,903,490.91
  5. Step 5: Solve for x
    x = 28,053,903,490.91/208,146.09
  6. Step 6: Final answer
    x = 134,779.87

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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.