Home / 208,089.68-312,180.96-81,742.16

Finding the Fourth Proportional to 208,089.68, 312,180.96 and 81,742.16

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Solution

The fourth proportional to 208,089.68, 312,180.96 and 81,742.16 is: 122,631.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,089.68 : 312,180.96 = 81,742.16 : x
  2. Step 2: Convert to fraction form
    208,089.68/312,180.96 = 81,742.16/x
  3. Step 3: Cross multiply
    208,089.68x = 312,180.96 × 81,742.16
  4. Step 4: Simplify right side
    208,089.68x = 25,518,345,981.27
  5. Step 5: Solve for x
    x = 25,518,345,981.27/208,089.68
  6. Step 6: Final answer
    x = 122,631.48

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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.