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Finding the Fourth Proportional to 133,368.78, 184,115.80 and 103,085.70

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Solution

The fourth proportional to 133,368.78, 184,115.80 and 103,085.70 is: 142,309.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,368.78 : 184,115.80 = 103,085.70 : x
  2. Step 2: Convert to fraction form
    133,368.78/184,115.80 = 103,085.70/x
  3. Step 3: Cross multiply
    133,368.78x = 184,115.80 × 103,085.70
  4. Step 4: Simplify right side
    133,368.78x = 18,979,706,124.06
  5. Step 5: Solve for x
    x = 18,979,706,124.06/133,368.78
  6. Step 6: Final answer
    x = 142,309.96

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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.