Home / 133,212.05-183,830.48-72,781.39

Finding the Fourth Proportional to 133,212.05, 183,830.48 and 72,781.39

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Solution

The fourth proportional to 133,212.05, 183,830.48 and 72,781.39 is: 100,437.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,212.05 : 183,830.48 = 72,781.39 : x
  2. Step 2: Convert to fraction form
    133,212.05/183,830.48 = 72,781.39/x
  3. Step 3: Cross multiply
    133,212.05x = 183,830.48 × 72,781.39
  4. Step 4: Simplify right side
    133,212.05x = 13,379,438,318.34
  5. Step 5: Solve for x
    x = 13,379,438,318.34/133,212.05
  6. Step 6: Final answer
    x = 100,437.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.