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Finding the Fourth Proportional to 131.04, 180.83 and 72.83

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Solution

The fourth proportional to 131.04, 180.83 and 72.83 is: 100.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.04 : 180.83 = 72.83 : x
  2. Step 2: Convert to fraction form
    131.04/180.83 = 72.83/x
  3. Step 3: Cross multiply
    131.04x = 180.83 × 72.83
  4. Step 4: Simplify right side
    131.04x = 13,169.13
  5. Step 5: Solve for x
    x = 13,169.13/131.04
  6. Step 6: Final answer
    x = 100.50

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