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Finding the Fourth Proportional to 103,356.20, 154,688.70 and 72,252.20

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Solution

The fourth proportional to 103,356.20, 154,688.70 and 72,252.20 is: 108,136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,356.20 : 154,688.70 = 72,252.20 : x
  2. Step 2: Convert to fraction form
    103,356.20/154,688.70 = 72,252.20/x
  3. Step 3: Cross multiply
    103,356.20x = 154,688.70 × 72,252.20
  4. Step 4: Simplify right side
    103,356.20x = 11,176,598,890.14
  5. Step 5: Solve for x
    x = 11,176,598,890.14/103,356.20
  6. Step 6: Final answer
    x = 108,136.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.