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Finding the Fourth Proportional to 194,560, 268,492.80 and 105,136

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Solution

The fourth proportional to 194,560, 268,492.80 and 105,136 is: 145,087.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,560 : 268,492.80 = 105,136 : x
  2. Step 2: Convert to fraction form
    194,560/268,492.80 = 105,136/x
  3. Step 3: Cross multiply
    194,560x = 268,492.80 × 105,136
  4. Step 4: Simplify right side
    194,560x = 28,228,259,020.80
  5. Step 5: Solve for x
    x = 28,228,259,020.80/194,560
  6. Step 6: Final answer
    x = 145,087.68

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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.