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Finding the Fourth Proportional to 133,310, 183,990.12 and 76,710.80

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Solution

The fourth proportional to 133,310, 183,990.12 and 76,710.80 is: 105,873.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,310 : 183,990.12 = 76,710.80 : x
  2. Step 2: Convert to fraction form
    133,310/183,990.12 = 76,710.80/x
  3. Step 3: Cross multiply
    133,310x = 183,990.12 × 76,710.80
  4. Step 4: Simplify right side
    133,310x = 14,114,029,297.30
  5. Step 5: Solve for x
    x = 14,114,029,297.30/133,310
  6. Step 6: Final answer
    x = 105,873.75

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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.