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Finding the Fourth Proportional to 133,681.50, 184,480.47 and 79,968.78

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Solution

The fourth proportional to 133,681.50, 184,480.47 and 79,968.78 is: 110,356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,681.50 : 184,480.47 = 79,968.78 : x
  2. Step 2: Convert to fraction form
    133,681.50/184,480.47 = 79,968.78/x
  3. Step 3: Cross multiply
    133,681.50x = 184,480.47 × 79,968.78
  4. Step 4: Simplify right side
    133,681.50x = 14,752,678,119.73
  5. Step 5: Solve for x
    x = 14,752,678,119.73/133,681.50
  6. Step 6: Final answer
    x = 110,356.92

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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.