Home / 77,066.49-115,602.11-20,906.38

Finding the Fourth Proportional to 77,066.49, 115,602.11 and 20,906.38

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Solution

The fourth proportional to 77,066.49, 115,602.11 and 20,906.38 is: 31,360.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,066.49 : 115,602.11 = 20,906.38 : x
  2. Step 2: Convert to fraction form
    77,066.49/115,602.11 = 20,906.38/x
  3. Step 3: Cross multiply
    77,066.49x = 115,602.11 × 20,906.38
  4. Step 4: Simplify right side
    77,066.49x = 2,416,820,957.92
  5. Step 5: Solve for x
    x = 2,416,820,957.92/77,066.49
  6. Step 6: Final answer
    x = 31,360.21

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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.